id int32 0 252k | repo stringlengths 7 55 | path stringlengths 4 127 | func_name stringlengths 1 88 | original_string stringlengths 75 19.8k | language stringclasses 1
value | code stringlengths 75 19.8k | code_tokens list | docstring stringlengths 3 17.3k | docstring_tokens list | sha stringlengths 40 40 | url stringlengths 87 242 |
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234,800 | rigetti/quantumflow | quantumflow/states.py | print_state | def print_state(state: State, file: TextIO = None) -> None:
"""Print a state vector"""
state = state.vec.asarray()
for index, amplitude in np.ndenumerate(state):
ket = "".join([str(n) for n in index])
print(ket, ":", amplitude, file=file) | python | def print_state(state: State, file: TextIO = None) -> None:
"""Print a state vector"""
state = state.vec.asarray()
for index, amplitude in np.ndenumerate(state):
ket = "".join([str(n) for n in index])
print(ket, ":", amplitude, file=file) | [
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234,801 | rigetti/quantumflow | quantumflow/states.py | print_probabilities | def print_probabilities(state: State, ndigits: int = 4,
file: TextIO = None) -> None:
"""
Pretty print state probabilities.
Args:
state:
ndigits: Number of digits of accuracy
file: Output stream (Defaults to stdout)
"""
prob = bk.evaluate(state.probab... | python | def print_probabilities(state: State, ndigits: int = 4,
file: TextIO = None) -> None:
"""
Pretty print state probabilities.
Args:
state:
ndigits: Number of digits of accuracy
file: Output stream (Defaults to stdout)
"""
prob = bk.evaluate(state.probab... | [
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234,802 | rigetti/quantumflow | quantumflow/states.py | mixed_density | def mixed_density(qubits: Union[int, Qubits]) -> Density:
"""Returns the completely mixed density matrix"""
N, qubits = qubits_count_tuple(qubits)
matrix = np.eye(2**N) / 2**N
return Density(matrix, qubits) | python | def mixed_density(qubits: Union[int, Qubits]) -> Density:
"""Returns the completely mixed density matrix"""
N, qubits = qubits_count_tuple(qubits)
matrix = np.eye(2**N) / 2**N
return Density(matrix, qubits) | [
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234,803 | rigetti/quantumflow | quantumflow/states.py | join_densities | def join_densities(*densities: Density) -> Density:
"""Join two mixed states into a larger qubit state"""
vectors = [rho.vec for rho in densities]
vec = reduce(outer_product, vectors)
memory = dict(ChainMap(*[rho.memory for rho in densities])) # TESTME
return Density(vec.tensor, vec.qubits, memory... | python | def join_densities(*densities: Density) -> Density:
"""Join two mixed states into a larger qubit state"""
vectors = [rho.vec for rho in densities]
vec = reduce(outer_product, vectors)
memory = dict(ChainMap(*[rho.memory for rho in densities])) # TESTME
return Density(vec.tensor, vec.qubits, memory... | [
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234,804 | rigetti/quantumflow | quantumflow/states.py | State.normalize | def normalize(self) -> 'State':
"""Normalize the state"""
tensor = self.tensor / bk.ccast(bk.sqrt(self.norm()))
return State(tensor, self.qubits, self._memory) | python | def normalize(self) -> 'State':
"""Normalize the state"""
tensor = self.tensor / bk.ccast(bk.sqrt(self.norm()))
return State(tensor, self.qubits, self._memory) | [
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234,805 | rigetti/quantumflow | quantumflow/states.py | State.sample | def sample(self, trials: int) -> np.ndarray:
"""Measure the state in the computational basis the the given number
of trials, and return the counts of each output configuration.
"""
# TODO: Can we do this within backend?
probs = np.real(bk.evaluate(self.probabilities()))
r... | python | def sample(self, trials: int) -> np.ndarray:
"""Measure the state in the computational basis the the given number
of trials, and return the counts of each output configuration.
"""
# TODO: Can we do this within backend?
probs = np.real(bk.evaluate(self.probabilities()))
r... | [
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234,806 | rigetti/quantumflow | quantumflow/states.py | State.expectation | def expectation(self, diag_hermitian: bk.TensorLike,
trials: int = None) -> bk.BKTensor:
"""Return the expectation of a measurement. Since we can only measure
our computer in the computational basis, we only require the diagonal
of the Hermitian in that basis.
If the... | python | def expectation(self, diag_hermitian: bk.TensorLike,
trials: int = None) -> bk.BKTensor:
"""Return the expectation of a measurement. Since we can only measure
our computer in the computational basis, we only require the diagonal
of the Hermitian in that basis.
If the... | [
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234,807 | rigetti/quantumflow | quantumflow/states.py | State.measure | def measure(self) -> np.ndarray:
"""Measure the state in the computational basis.
Returns:
A [2]*bits array of qubit states, either 0 or 1
"""
# TODO: Can we do this within backend?
probs = np.real(bk.evaluate(self.probabilities()))
indices = np.asarray(list(... | python | def measure(self) -> np.ndarray:
"""Measure the state in the computational basis.
Returns:
A [2]*bits array of qubit states, either 0 or 1
"""
# TODO: Can we do this within backend?
probs = np.real(bk.evaluate(self.probabilities()))
indices = np.asarray(list(... | [
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234,808 | rigetti/quantumflow | quantumflow/states.py | State.asdensity | def asdensity(self) -> 'Density':
"""Convert a pure state to a density matrix"""
matrix = bk.outer(self.tensor, bk.conj(self.tensor))
return Density(matrix, self.qubits, self._memory) | python | def asdensity(self) -> 'Density':
"""Convert a pure state to a density matrix"""
matrix = bk.outer(self.tensor, bk.conj(self.tensor))
return Density(matrix, self.qubits, self._memory) | [
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234,809 | rigetti/quantumflow | tools/benchmark.py | benchmark | def benchmark(N, gates):
"""Create and run a circuit with N qubits and given number of gates"""
qubits = list(range(0, N))
ket = qf.zero_state(N)
for n in range(0, N):
ket = qf.H(n).run(ket)
for _ in range(0, (gates-N)//3):
qubit0, qubit1 = random.sample(qubits, 2)
ket = qf... | python | def benchmark(N, gates):
"""Create and run a circuit with N qubits and given number of gates"""
qubits = list(range(0, N))
ket = qf.zero_state(N)
for n in range(0, N):
ket = qf.H(n).run(ket)
for _ in range(0, (gates-N)//3):
qubit0, qubit1 = random.sample(qubits, 2)
ket = qf... | [
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234,810 | rigetti/quantumflow | examples/weyl.py | sandwich_decompositions | def sandwich_decompositions(coords0, coords1, samples=SAMPLES):
"""Create composite gates, decompose, and return a list
of canonical coordinates"""
decomps = []
for _ in range(samples):
circ = qf.Circuit()
circ += qf.CANONICAL(*coords0, 0, 1)
circ += qf.random_gate([0])
c... | python | def sandwich_decompositions(coords0, coords1, samples=SAMPLES):
"""Create composite gates, decompose, and return a list
of canonical coordinates"""
decomps = []
for _ in range(samples):
circ = qf.Circuit()
circ += qf.CANONICAL(*coords0, 0, 1)
circ += qf.random_gate([0])
c... | [
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234,811 | rigetti/quantumflow | quantumflow/paulialgebra.py | sX | def sX(qubit: Qubit, coefficient: complex = 1.0) -> Pauli:
"""Return the Pauli sigma_X operator acting on the given qubit"""
return Pauli.sigma(qubit, 'X', coefficient) | python | def sX(qubit: Qubit, coefficient: complex = 1.0) -> Pauli:
"""Return the Pauli sigma_X operator acting on the given qubit"""
return Pauli.sigma(qubit, 'X', coefficient) | [
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234,812 | rigetti/quantumflow | quantumflow/paulialgebra.py | sY | def sY(qubit: Qubit, coefficient: complex = 1.0) -> Pauli:
"""Return the Pauli sigma_Y operator acting on the given qubit"""
return Pauli.sigma(qubit, 'Y', coefficient) | python | def sY(qubit: Qubit, coefficient: complex = 1.0) -> Pauli:
"""Return the Pauli sigma_Y operator acting on the given qubit"""
return Pauli.sigma(qubit, 'Y', coefficient) | [
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234,813 | rigetti/quantumflow | quantumflow/paulialgebra.py | sZ | def sZ(qubit: Qubit, coefficient: complex = 1.0) -> Pauli:
"""Return the Pauli sigma_Z operator acting on the given qubit"""
return Pauli.sigma(qubit, 'Z', coefficient) | python | def sZ(qubit: Qubit, coefficient: complex = 1.0) -> Pauli:
"""Return the Pauli sigma_Z operator acting on the given qubit"""
return Pauli.sigma(qubit, 'Z', coefficient) | [
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234,814 | rigetti/quantumflow | quantumflow/paulialgebra.py | pauli_sum | def pauli_sum(*elements: Pauli) -> Pauli:
"""Return the sum of elements of the Pauli algebra"""
terms = []
key = itemgetter(0)
for term, grp in groupby(heapq.merge(*elements, key=key), key=key):
coeff = sum(g[1] for g in grp)
if not isclose(coeff, 0.0):
terms.append((term, c... | python | def pauli_sum(*elements: Pauli) -> Pauli:
"""Return the sum of elements of the Pauli algebra"""
terms = []
key = itemgetter(0)
for term, grp in groupby(heapq.merge(*elements, key=key), key=key):
coeff = sum(g[1] for g in grp)
if not isclose(coeff, 0.0):
terms.append((term, c... | [
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234,815 | rigetti/quantumflow | quantumflow/paulialgebra.py | pauli_product | def pauli_product(*elements: Pauli) -> Pauli:
"""Return the product of elements of the Pauli algebra"""
result_terms = []
for terms in product(*elements):
coeff = reduce(mul, [term[1] for term in terms])
ops = (term[0] for term in terms)
out = []
key = itemgetter(0)
... | python | def pauli_product(*elements: Pauli) -> Pauli:
"""Return the product of elements of the Pauli algebra"""
result_terms = []
for terms in product(*elements):
coeff = reduce(mul, [term[1] for term in terms])
ops = (term[0] for term in terms)
out = []
key = itemgetter(0)
... | [
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234,816 | rigetti/quantumflow | quantumflow/paulialgebra.py | pauli_pow | def pauli_pow(pauli: Pauli, exponent: int) -> Pauli:
"""
Raise an element of the Pauli algebra to a non-negative integer power.
"""
if not isinstance(exponent, int) or exponent < 0:
raise ValueError("The exponent must be a non-negative integer.")
if exponent == 0:
return Pauli.iden... | python | def pauli_pow(pauli: Pauli, exponent: int) -> Pauli:
"""
Raise an element of the Pauli algebra to a non-negative integer power.
"""
if not isinstance(exponent, int) or exponent < 0:
raise ValueError("The exponent must be a non-negative integer.")
if exponent == 0:
return Pauli.iden... | [
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234,817 | rigetti/quantumflow | quantumflow/paulialgebra.py | pauli_commuting_sets | def pauli_commuting_sets(element: Pauli) -> Tuple[Pauli, ...]:
"""Gather the terms of a Pauli polynomial into commuting sets.
Uses the algorithm defined in (Raeisi, Wiebe, Sanders,
arXiv:1108.4318, 2011) to find commuting sets. Except uses commutation
check from arXiv:1405.5749v2
"""
if len(ele... | python | def pauli_commuting_sets(element: Pauli) -> Tuple[Pauli, ...]:
"""Gather the terms of a Pauli polynomial into commuting sets.
Uses the algorithm defined in (Raeisi, Wiebe, Sanders,
arXiv:1108.4318, 2011) to find commuting sets. Except uses commutation
check from arXiv:1405.5749v2
"""
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234,818 | rigetti/quantumflow | quantumflow/backend/numpybk.py | astensor | def astensor(array: TensorLike) -> BKTensor:
"""Converts a numpy array to the backend's tensor object
"""
array = np.asarray(array, dtype=CTYPE)
return array | python | def astensor(array: TensorLike) -> BKTensor:
"""Converts a numpy array to the backend's tensor object
"""
array = np.asarray(array, dtype=CTYPE)
return array | [
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234,819 | rigetti/quantumflow | quantumflow/backend/numpybk.py | productdiag | def productdiag(tensor: BKTensor) -> BKTensor:
"""Returns the matrix diagonal of the product tensor""" # DOCME: Explain
N = rank(tensor)
tensor = reshape(tensor, [2**(N//2), 2**(N//2)])
tensor = np.diag(tensor)
tensor = reshape(tensor, [2]*(N//2))
return tensor | python | def productdiag(tensor: BKTensor) -> BKTensor:
"""Returns the matrix diagonal of the product tensor""" # DOCME: Explain
N = rank(tensor)
tensor = reshape(tensor, [2**(N//2), 2**(N//2)])
tensor = np.diag(tensor)
tensor = reshape(tensor, [2]*(N//2))
return tensor | [
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234,820 | rigetti/quantumflow | quantumflow/backend/numpybk.py | tensormul | def tensormul(tensor0: BKTensor, tensor1: BKTensor,
indices: typing.List[int]) -> BKTensor:
r"""
Generalization of matrix multiplication to product tensors.
A state vector in product tensor representation has N dimension, one for
each contravariant index, e.g. for 3-qubit states
:math... | python | def tensormul(tensor0: BKTensor, tensor1: BKTensor,
indices: typing.List[int]) -> BKTensor:
r"""
Generalization of matrix multiplication to product tensors.
A state vector in product tensor representation has N dimension, one for
each contravariant index, e.g. for 3-qubit states
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234,821 | rigetti/quantumflow | quantumflow/utils.py | invert_map | def invert_map(mapping: dict, one_to_one: bool = True) -> dict:
"""Invert a dictionary. If not one_to_one then the inverted
map will contain lists of former keys as values.
"""
if one_to_one:
inv_map = {value: key for key, value in mapping.items()}
else:
inv_map = {}
for key,... | python | def invert_map(mapping: dict, one_to_one: bool = True) -> dict:
"""Invert a dictionary. If not one_to_one then the inverted
map will contain lists of former keys as values.
"""
if one_to_one:
inv_map = {value: key for key, value in mapping.items()}
else:
inv_map = {}
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234,822 | rigetti/quantumflow | quantumflow/utils.py | bitlist_to_int | def bitlist_to_int(bitlist: Sequence[int]) -> int:
"""Converts a sequence of bits to an integer.
>>> from quantumflow.utils import bitlist_to_int
>>> bitlist_to_int([1, 0, 0])
4
"""
return int(''.join([str(d) for d in bitlist]), 2) | python | def bitlist_to_int(bitlist: Sequence[int]) -> int:
"""Converts a sequence of bits to an integer.
>>> from quantumflow.utils import bitlist_to_int
>>> bitlist_to_int([1, 0, 0])
4
"""
return int(''.join([str(d) for d in bitlist]), 2) | [
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234,823 | rigetti/quantumflow | quantumflow/utils.py | int_to_bitlist | def int_to_bitlist(x: int, pad: int = None) -> Sequence[int]:
"""Converts an integer to a binary sequence of bits.
Pad prepends with sufficient zeros to ensures that the returned list
contains at least this number of bits.
>>> from quantumflow.utils import int_to_bitlist
>>> int_to_bitlist(4, 4))
... | python | def int_to_bitlist(x: int, pad: int = None) -> Sequence[int]:
"""Converts an integer to a binary sequence of bits.
Pad prepends with sufficient zeros to ensures that the returned list
contains at least this number of bits.
>>> from quantumflow.utils import int_to_bitlist
>>> int_to_bitlist(4, 4))
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234,824 | rigetti/quantumflow | quantumflow/utils.py | spanning_tree_count | def spanning_tree_count(graph: nx.Graph) -> int:
"""Return the number of unique spanning trees of a graph, using
Kirchhoff's matrix tree theorem.
"""
laplacian = nx.laplacian_matrix(graph).toarray()
comatrix = laplacian[:-1, :-1]
det = np.linalg.det(comatrix)
count = int(round(det))
retu... | python | def spanning_tree_count(graph: nx.Graph) -> int:
"""Return the number of unique spanning trees of a graph, using
Kirchhoff's matrix tree theorem.
"""
laplacian = nx.laplacian_matrix(graph).toarray()
comatrix = laplacian[:-1, :-1]
det = np.linalg.det(comatrix)
count = int(round(det))
retu... | [
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234,825 | rigetti/quantumflow | quantumflow/utils.py | rationalize | def rationalize(flt: float, denominators: Set[int] = None) -> Fraction:
"""Convert a floating point number to a Fraction with a small
denominator.
Args:
flt: A floating point number
denominators: Collection of standard denominators. Default is
1, 2, 3, 4, 5, 6, 7, 8... | python | def rationalize(flt: float, denominators: Set[int] = None) -> Fraction:
"""Convert a floating point number to a Fraction with a small
denominator.
Args:
flt: A floating point number
denominators: Collection of standard denominators. Default is
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234,826 | rigetti/quantumflow | quantumflow/utils.py | symbolize | def symbolize(flt: float) -> sympy.Symbol:
"""Attempt to convert a real number into a simpler symbolic
representation.
Returns:
A sympy Symbol. (Convert to string with str(sym) or to latex with
sympy.latex(sym)
Raises:
ValueError: If cannot simplify float
"""
try... | python | def symbolize(flt: float) -> sympy.Symbol:
"""Attempt to convert a real number into a simpler symbolic
representation.
Returns:
A sympy Symbol. (Convert to string with str(sym) or to latex with
sympy.latex(sym)
Raises:
ValueError: If cannot simplify float
"""
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234,827 | rigetti/quantumflow | quantumflow/forest/__init__.py | pyquil_to_image | def pyquil_to_image(program: pyquil.Program) -> PIL.Image: # pragma: no cover
"""Returns an image of a pyquil circuit.
See circuit_to_latex() for more details.
"""
circ = pyquil_to_circuit(program)
latex = circuit_to_latex(circ)
img = render_latex(latex)
return img | python | def pyquil_to_image(program: pyquil.Program) -> PIL.Image: # pragma: no cover
"""Returns an image of a pyquil circuit.
See circuit_to_latex() for more details.
"""
circ = pyquil_to_circuit(program)
latex = circuit_to_latex(circ)
img = render_latex(latex)
return img | [
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234,828 | rigetti/quantumflow | quantumflow/forest/__init__.py | circuit_to_pyquil | def circuit_to_pyquil(circuit: Circuit) -> pyquil.Program:
"""Convert a QuantumFlow circuit to a pyQuil program"""
prog = pyquil.Program()
for elem in circuit.elements:
if isinstance(elem, Gate) and elem.name in QUIL_GATES:
params = list(elem.params.values()) if elem.params else []
... | python | def circuit_to_pyquil(circuit: Circuit) -> pyquil.Program:
"""Convert a QuantumFlow circuit to a pyQuil program"""
prog = pyquil.Program()
for elem in circuit.elements:
if isinstance(elem, Gate) and elem.name in QUIL_GATES:
params = list(elem.params.values()) if elem.params else []
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234,829 | rigetti/quantumflow | quantumflow/forest/__init__.py | pyquil_to_circuit | def pyquil_to_circuit(program: pyquil.Program) -> Circuit:
"""Convert a protoquil pyQuil program to a QuantumFlow Circuit"""
circ = Circuit()
for inst in program.instructions:
# print(type(inst))
if isinstance(inst, pyquil.Declare): # Ignore
continue
if isinst... | python | def pyquil_to_circuit(program: pyquil.Program) -> Circuit:
"""Convert a protoquil pyQuil program to a QuantumFlow Circuit"""
circ = Circuit()
for inst in program.instructions:
# print(type(inst))
if isinstance(inst, pyquil.Declare): # Ignore
continue
if isinst... | [
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234,830 | rigetti/quantumflow | quantumflow/forest/__init__.py | quil_to_program | def quil_to_program(quil: str) -> Program:
"""Parse a quil program and return a Program object"""
pyquil_instructions = pyquil.parser.parse(quil)
return pyquil_to_program(pyquil_instructions) | python | def quil_to_program(quil: str) -> Program:
"""Parse a quil program and return a Program object"""
pyquil_instructions = pyquil.parser.parse(quil)
return pyquil_to_program(pyquil_instructions) | [
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234,831 | rigetti/quantumflow | quantumflow/forest/__init__.py | state_to_wavefunction | def state_to_wavefunction(state: State) -> pyquil.Wavefunction:
"""Convert a QuantumFlow state to a pyQuil Wavefunction"""
# TODO: qubits?
amplitudes = state.vec.asarray()
# pyQuil labels states backwards.
amplitudes = amplitudes.transpose()
amplitudes = amplitudes.reshape([amplitudes.size])
... | python | def state_to_wavefunction(state: State) -> pyquil.Wavefunction:
"""Convert a QuantumFlow state to a pyQuil Wavefunction"""
# TODO: qubits?
amplitudes = state.vec.asarray()
# pyQuil labels states backwards.
amplitudes = amplitudes.transpose()
amplitudes = amplitudes.reshape([amplitudes.size])
... | [
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234,832 | rigetti/quantumflow | quantumflow/forest/__init__.py | QuantumFlowQVM.load | def load(self, binary: pyquil.Program) -> 'QuantumFlowQVM':
"""
Load a pyQuil program, and initialize QVM into a fresh state.
Args:
binary: A pyQuil program
"""
assert self.status in ['connected', 'done']
prog = quil_to_program(str(binary))
self._pr... | python | def load(self, binary: pyquil.Program) -> 'QuantumFlowQVM':
"""
Load a pyQuil program, and initialize QVM into a fresh state.
Args:
binary: A pyQuil program
"""
assert self.status in ['connected', 'done']
prog = quil_to_program(str(binary))
self._pr... | [
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234,833 | rigetti/quantumflow | quantumflow/forest/__init__.py | QuantumFlowQVM.run | def run(self) -> 'QuantumFlowQVM':
"""Run a previously loaded program"""
assert self.status in ['loaded']
self.status = 'running'
self._ket = self._prog.run()
# Should set state to 'done' after run complete.
# Makes no sense to keep status at running. But pyQuil's
... | python | def run(self) -> 'QuantumFlowQVM':
"""Run a previously loaded program"""
assert self.status in ['loaded']
self.status = 'running'
self._ket = self._prog.run()
# Should set state to 'done' after run complete.
# Makes no sense to keep status at running. But pyQuil's
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234,834 | rigetti/quantumflow | quantumflow/forest/__init__.py | QuantumFlowQVM.wavefunction | def wavefunction(self) -> pyquil.Wavefunction:
"""
Return the wavefunction of a completed program.
"""
assert self.status == 'done'
assert self._ket is not None
wavefn = state_to_wavefunction(self._ket)
return wavefn | python | def wavefunction(self) -> pyquil.Wavefunction:
"""
Return the wavefunction of a completed program.
"""
assert self.status == 'done'
assert self._ket is not None
wavefn = state_to_wavefunction(self._ket)
return wavefn | [
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234,835 | rigetti/quantumflow | quantumflow/backend/torchbk.py | evaluate | def evaluate(tensor: BKTensor) -> TensorLike:
"""Return the value of a tensor"""
if isinstance(tensor, _DTYPE):
if torch.numel(tensor) == 1:
return tensor.item()
if tensor.numel() == 2:
return tensor[0].cpu().numpy() + 1.0j * tensor[1].cpu().numpy()
return tensor... | python | def evaluate(tensor: BKTensor) -> TensorLike:
"""Return the value of a tensor"""
if isinstance(tensor, _DTYPE):
if torch.numel(tensor) == 1:
return tensor.item()
if tensor.numel() == 2:
return tensor[0].cpu().numpy() + 1.0j * tensor[1].cpu().numpy()
return tensor... | [
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234,836 | rigetti/quantumflow | quantumflow/backend/torchbk.py | rank | def rank(tensor: BKTensor) -> int:
"""Return the number of dimensions of a tensor"""
if isinstance(tensor, np.ndarray):
return len(tensor.shape)
return len(tensor[0].size()) | python | def rank(tensor: BKTensor) -> int:
"""Return the number of dimensions of a tensor"""
if isinstance(tensor, np.ndarray):
return len(tensor.shape)
return len(tensor[0].size()) | [
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234,837 | rigetti/quantumflow | quantumflow/measures.py | state_fidelity | def state_fidelity(state0: State, state1: State) -> bk.BKTensor:
"""Return the quantum fidelity between pure states."""
assert state0.qubits == state1.qubits # FIXME
tensor = bk.absolute(bk.inner(state0.tensor, state1.tensor))**bk.fcast(2)
return tensor | python | def state_fidelity(state0: State, state1: State) -> bk.BKTensor:
"""Return the quantum fidelity between pure states."""
assert state0.qubits == state1.qubits # FIXME
tensor = bk.absolute(bk.inner(state0.tensor, state1.tensor))**bk.fcast(2)
return tensor | [
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234,838 | rigetti/quantumflow | quantumflow/measures.py | state_angle | def state_angle(ket0: State, ket1: State) -> bk.BKTensor:
"""The Fubini-Study angle between states.
Equal to the Burrs angle for pure states.
"""
return fubini_study_angle(ket0.vec, ket1.vec) | python | def state_angle(ket0: State, ket1: State) -> bk.BKTensor:
"""The Fubini-Study angle between states.
Equal to the Burrs angle for pure states.
"""
return fubini_study_angle(ket0.vec, ket1.vec) | [
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234,839 | rigetti/quantumflow | quantumflow/measures.py | states_close | def states_close(state0: State, state1: State,
tolerance: float = TOLERANCE) -> bool:
"""Returns True if states are almost identical.
Closeness is measured with the metric Fubini-Study angle.
"""
return vectors_close(state0.vec, state1.vec, tolerance) | python | def states_close(state0: State, state1: State,
tolerance: float = TOLERANCE) -> bool:
"""Returns True if states are almost identical.
Closeness is measured with the metric Fubini-Study angle.
"""
return vectors_close(state0.vec, state1.vec, tolerance) | [
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234,840 | rigetti/quantumflow | quantumflow/measures.py | purity | def purity(rho: Density) -> bk.BKTensor:
"""
Calculate the purity of a mixed quantum state.
Purity, defined as tr(rho^2), has an upper bound of 1 for a pure state,
and a lower bound of 1/D (where D is the Hilbert space dimension) for a
competently mixed state.
Two closely related measures are ... | python | def purity(rho: Density) -> bk.BKTensor:
"""
Calculate the purity of a mixed quantum state.
Purity, defined as tr(rho^2), has an upper bound of 1 for a pure state,
and a lower bound of 1/D (where D is the Hilbert space dimension) for a
competently mixed state.
Two closely related measures are ... | [
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234,841 | rigetti/quantumflow | quantumflow/measures.py | bures_distance | def bures_distance(rho0: Density, rho1: Density) -> float:
"""Return the Bures distance between mixed quantum states
Note: Bures distance cannot be calculated within the tensor backend.
"""
fid = fidelity(rho0, rho1)
op0 = asarray(rho0.asoperator())
op1 = asarray(rho1.asoperator())
tr0 = np... | python | def bures_distance(rho0: Density, rho1: Density) -> float:
"""Return the Bures distance between mixed quantum states
Note: Bures distance cannot be calculated within the tensor backend.
"""
fid = fidelity(rho0, rho1)
op0 = asarray(rho0.asoperator())
op1 = asarray(rho1.asoperator())
tr0 = np... | [
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234,842 | rigetti/quantumflow | quantumflow/measures.py | bures_angle | def bures_angle(rho0: Density, rho1: Density) -> float:
"""Return the Bures angle between mixed quantum states
Note: Bures angle cannot be calculated within the tensor backend.
"""
return np.arccos(np.sqrt(fidelity(rho0, rho1))) | python | def bures_angle(rho0: Density, rho1: Density) -> float:
"""Return the Bures angle between mixed quantum states
Note: Bures angle cannot be calculated within the tensor backend.
"""
return np.arccos(np.sqrt(fidelity(rho0, rho1))) | [
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234,843 | rigetti/quantumflow | quantumflow/measures.py | density_angle | def density_angle(rho0: Density, rho1: Density) -> bk.BKTensor:
"""The Fubini-Study angle between density matrices"""
return fubini_study_angle(rho0.vec, rho1.vec) | python | def density_angle(rho0: Density, rho1: Density) -> bk.BKTensor:
"""The Fubini-Study angle between density matrices"""
return fubini_study_angle(rho0.vec, rho1.vec) | [
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234,844 | rigetti/quantumflow | quantumflow/measures.py | densities_close | def densities_close(rho0: Density, rho1: Density,
tolerance: float = TOLERANCE) -> bool:
"""Returns True if densities are almost identical.
Closeness is measured with the metric Fubini-Study angle.
"""
return vectors_close(rho0.vec, rho1.vec, tolerance) | python | def densities_close(rho0: Density, rho1: Density,
tolerance: float = TOLERANCE) -> bool:
"""Returns True if densities are almost identical.
Closeness is measured with the metric Fubini-Study angle.
"""
return vectors_close(rho0.vec, rho1.vec, tolerance) | [
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234,845 | rigetti/quantumflow | quantumflow/measures.py | entropy | def entropy(rho: Density, base: float = None) -> float:
"""
Returns the von-Neumann entropy of a mixed quantum state.
Args:
rho: A density matrix
base: Optional logarithm base. Default is base e, and entropy is
measures in nats. For bits set base to 2.
Returns:
... | python | def entropy(rho: Density, base: float = None) -> float:
"""
Returns the von-Neumann entropy of a mixed quantum state.
Args:
rho: A density matrix
base: Optional logarithm base. Default is base e, and entropy is
measures in nats. For bits set base to 2.
Returns:
... | [
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234,846 | rigetti/quantumflow | quantumflow/measures.py | mutual_info | def mutual_info(rho: Density,
qubits0: Qubits,
qubits1: Qubits = None,
base: float = None) -> float:
"""Compute the bipartite von-Neumann mutual information of a mixed
quantum state.
Args:
rho: A density matrix of the complete system
qubits... | python | def mutual_info(rho: Density,
qubits0: Qubits,
qubits1: Qubits = None,
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"""Compute the bipartite von-Neumann mutual information of a mixed
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Args:
rho: A density matrix of the complete system
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rho: A density matrix of the complete system
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234,847 | rigetti/quantumflow | quantumflow/measures.py | gate_angle | def gate_angle(gate0: Gate, gate1: Gate) -> bk.BKTensor:
"""The Fubini-Study angle between gates"""
return fubini_study_angle(gate0.vec, gate1.vec) | python | def gate_angle(gate0: Gate, gate1: Gate) -> bk.BKTensor:
"""The Fubini-Study angle between gates"""
return fubini_study_angle(gate0.vec, gate1.vec) | [
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234,848 | rigetti/quantumflow | quantumflow/measures.py | channel_angle | def channel_angle(chan0: Channel, chan1: Channel) -> bk.BKTensor:
"""The Fubini-Study angle between channels"""
return fubini_study_angle(chan0.vec, chan1.vec) | python | def channel_angle(chan0: Channel, chan1: Channel) -> bk.BKTensor:
"""The Fubini-Study angle between channels"""
return fubini_study_angle(chan0.vec, chan1.vec) | [
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234,849 | rigetti/quantumflow | quantumflow/qubits.py | inner_product | def inner_product(vec0: QubitVector, vec1: QubitVector) -> bk.BKTensor:
""" Hilbert-Schmidt inner product between qubit vectors
The tensor rank and qubits must match.
"""
if vec0.rank != vec1.rank or vec0.qubit_nb != vec1.qubit_nb:
raise ValueError('Incompatibly vectors. Qubits and rank must ma... | python | def inner_product(vec0: QubitVector, vec1: QubitVector) -> bk.BKTensor:
""" Hilbert-Schmidt inner product between qubit vectors
The tensor rank and qubits must match.
"""
if vec0.rank != vec1.rank or vec0.qubit_nb != vec1.qubit_nb:
raise ValueError('Incompatibly vectors. Qubits and rank must ma... | [
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234,850 | rigetti/quantumflow | quantumflow/qubits.py | outer_product | def outer_product(vec0: QubitVector, vec1: QubitVector) -> QubitVector:
"""Direct product of qubit vectors
The tensor ranks must match and qubits must be disjoint.
"""
R = vec0.rank
R1 = vec1.rank
N0 = vec0.qubit_nb
N1 = vec1.qubit_nb
if R != R1:
raise ValueError('Incompatibly... | python | def outer_product(vec0: QubitVector, vec1: QubitVector) -> QubitVector:
"""Direct product of qubit vectors
The tensor ranks must match and qubits must be disjoint.
"""
R = vec0.rank
R1 = vec1.rank
N0 = vec0.qubit_nb
N1 = vec1.qubit_nb
if R != R1:
raise ValueError('Incompatibly... | [
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234,851 | rigetti/quantumflow | quantumflow/qubits.py | vectors_close | def vectors_close(vec0: QubitVector, vec1: QubitVector,
tolerance: float = TOLERANCE) -> bool:
"""Return True if vectors in close in the projective Hilbert space.
Similarity is measured with the Fubini–Study metric.
"""
if vec0.rank != vec1.rank:
return False
if vec0.qubi... | python | def vectors_close(vec0: QubitVector, vec1: QubitVector,
tolerance: float = TOLERANCE) -> bool:
"""Return True if vectors in close in the projective Hilbert space.
Similarity is measured with the Fubini–Study metric.
"""
if vec0.rank != vec1.rank:
return False
if vec0.qubi... | [
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234,852 | rigetti/quantumflow | quantumflow/qubits.py | QubitVector.flatten | def flatten(self) -> bk.BKTensor:
"""Return tensor with with qubit indices flattened"""
N = self.qubit_nb
R = self.rank
return bk.reshape(self.tensor, [2**N]*R) | python | def flatten(self) -> bk.BKTensor:
"""Return tensor with with qubit indices flattened"""
N = self.qubit_nb
R = self.rank
return bk.reshape(self.tensor, [2**N]*R) | [
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234,853 | rigetti/quantumflow | quantumflow/qubits.py | QubitVector.relabel | def relabel(self, qubits: Qubits) -> 'QubitVector':
"""Return a copy of this vector with new qubits"""
qubits = tuple(qubits)
assert len(qubits) == self.qubit_nb
vec = copy(self)
vec.qubits = qubits
return vec | python | def relabel(self, qubits: Qubits) -> 'QubitVector':
"""Return a copy of this vector with new qubits"""
qubits = tuple(qubits)
assert len(qubits) == self.qubit_nb
vec = copy(self)
vec.qubits = qubits
return vec | [
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234,854 | rigetti/quantumflow | quantumflow/qubits.py | QubitVector.H | def H(self) -> 'QubitVector':
"""Return the conjugate transpose of this tensor."""
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# (super) operator transpose
tensor = self.tensor
tensor = bk.reshape(tensor, [2**(N*R//2)] * 2)
tensor = bk.transpose(tensor)
tensor = bk.r... | python | def H(self) -> 'QubitVector':
"""Return the conjugate transpose of this tensor."""
N = self.qubit_nb
R = self.rank
# (super) operator transpose
tensor = self.tensor
tensor = bk.reshape(tensor, [2**(N*R//2)] * 2)
tensor = bk.transpose(tensor)
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234,855 | rigetti/quantumflow | quantumflow/qubits.py | QubitVector.norm | def norm(self) -> bk.BKTensor:
"""Return the norm of this vector"""
return bk.absolute(bk.inner(self.tensor, self.tensor)) | python | def norm(self) -> bk.BKTensor:
"""Return the norm of this vector"""
return bk.absolute(bk.inner(self.tensor, self.tensor)) | [
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234,856 | rigetti/quantumflow | quantumflow/qubits.py | QubitVector.partial_trace | def partial_trace(self, qubits: Qubits) -> 'QubitVector':
"""
Return the partial trace over some subset of qubits"""
N = self.qubit_nb
R = self.rank
if R == 1:
raise ValueError('Cannot take trace of vector')
new_qubits: List[Qubit] = list(self.qubits)
... | python | def partial_trace(self, qubits: Qubits) -> 'QubitVector':
"""
Return the partial trace over some subset of qubits"""
N = self.qubit_nb
R = self.rank
if R == 1:
raise ValueError('Cannot take trace of vector')
new_qubits: List[Qubit] = list(self.qubits)
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234,857 | rigetti/quantumflow | examples/tensorflow2_fit_gate.py | fit_zyz | def fit_zyz(target_gate):
"""
Tensorflow 2.0 example. Given an arbitrary one-qubit gate, use
gradient descent to find corresponding parameters of a universal ZYZ
gate.
"""
steps = 1000
dev = '/gpu:0' if bk.DEVICE == 'gpu' else '/cpu:0'
with tf.device(dev):
t = tf.Variable(tf.r... | python | def fit_zyz(target_gate):
"""
Tensorflow 2.0 example. Given an arbitrary one-qubit gate, use
gradient descent to find corresponding parameters of a universal ZYZ
gate.
"""
steps = 1000
dev = '/gpu:0' if bk.DEVICE == 'gpu' else '/cpu:0'
with tf.device(dev):
t = tf.Variable(tf.r... | [
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234,858 | rigetti/quantumflow | quantumflow/programs.py | Program.run | def run(self, ket: State = None) -> State:
"""Compiles and runs a program. The optional program argument
supplies the initial state and memory. Else qubits and classical
bits start from zero states.
"""
if ket is None:
qubits = self.qubits
ket = zero_state... | python | def run(self, ket: State = None) -> State:
"""Compiles and runs a program. The optional program argument
supplies the initial state and memory. Else qubits and classical
bits start from zero states.
"""
if ket is None:
qubits = self.qubits
ket = zero_state... | [
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234,859 | rigetti/quantumflow | quantumflow/ops.py | Gate.relabel | def relabel(self, qubits: Qubits) -> 'Gate':
"""Return a copy of this Gate with new qubits"""
gate = copy(self)
gate.vec = gate.vec.relabel(qubits)
return gate | python | def relabel(self, qubits: Qubits) -> 'Gate':
"""Return a copy of this Gate with new qubits"""
gate = copy(self)
gate.vec = gate.vec.relabel(qubits)
return gate | [
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234,860 | rigetti/quantumflow | quantumflow/ops.py | Gate.run | def run(self, ket: State) -> State:
"""Apply the action of this gate upon a state"""
qubits = self.qubits
indices = [ket.qubits.index(q) for q in qubits]
tensor = bk.tensormul(self.tensor, ket.tensor, indices)
return State(tensor, ket.qubits, ket.memory) | python | def run(self, ket: State) -> State:
"""Apply the action of this gate upon a state"""
qubits = self.qubits
indices = [ket.qubits.index(q) for q in qubits]
tensor = bk.tensormul(self.tensor, ket.tensor, indices)
return State(tensor, ket.qubits, ket.memory) | [
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234,861 | rigetti/quantumflow | quantumflow/ops.py | Gate.evolve | def evolve(self, rho: Density) -> Density:
"""Apply the action of this gate upon a density"""
# TODO: implement without explicit channel creation?
chan = self.aschannel()
return chan.evolve(rho) | python | def evolve(self, rho: Density) -> Density:
"""Apply the action of this gate upon a density"""
# TODO: implement without explicit channel creation?
chan = self.aschannel()
return chan.evolve(rho) | [
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234,862 | rigetti/quantumflow | quantumflow/ops.py | Gate.aschannel | def aschannel(self) -> 'Channel':
"""Converts a Gate into a Channel"""
N = self.qubit_nb
R = 4
tensor = bk.outer(self.tensor, self.H.tensor)
tensor = bk.reshape(tensor, [2**N]*R)
tensor = bk.transpose(tensor, [0, 3, 1, 2])
return Channel(tensor, self.qubits) | python | def aschannel(self) -> 'Channel':
"""Converts a Gate into a Channel"""
N = self.qubit_nb
R = 4
tensor = bk.outer(self.tensor, self.H.tensor)
tensor = bk.reshape(tensor, [2**N]*R)
tensor = bk.transpose(tensor, [0, 3, 1, 2])
return Channel(tensor, self.qubits) | [
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234,863 | rigetti/quantumflow | quantumflow/ops.py | Gate.su | def su(self) -> 'Gate':
"""Convert gate tensor to the special unitary group."""
rank = 2**self.qubit_nb
U = asarray(self.asoperator())
U /= np.linalg.det(U) ** (1/rank)
return Gate(tensor=U, qubits=self.qubits) | python | def su(self) -> 'Gate':
"""Convert gate tensor to the special unitary group."""
rank = 2**self.qubit_nb
U = asarray(self.asoperator())
U /= np.linalg.det(U) ** (1/rank)
return Gate(tensor=U, qubits=self.qubits) | [
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234,864 | rigetti/quantumflow | quantumflow/ops.py | Channel.relabel | def relabel(self, qubits: Qubits) -> 'Channel':
"""Return a copy of this channel with new qubits"""
chan = copy(self)
chan.vec = chan.vec.relabel(qubits)
return chan | python | def relabel(self, qubits: Qubits) -> 'Channel':
"""Return a copy of this channel with new qubits"""
chan = copy(self)
chan.vec = chan.vec.relabel(qubits)
return chan | [
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234,865 | rigetti/quantumflow | quantumflow/ops.py | Channel.permute | def permute(self, qubits: Qubits) -> 'Channel':
"""Return a copy of this channel with qubits in new order"""
vec = self.vec.permute(qubits)
return Channel(vec.tensor, qubits=vec.qubits) | python | def permute(self, qubits: Qubits) -> 'Channel':
"""Return a copy of this channel with qubits in new order"""
vec = self.vec.permute(qubits)
return Channel(vec.tensor, qubits=vec.qubits) | [
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234,866 | rigetti/quantumflow | quantumflow/ops.py | Channel.sharp | def sharp(self) -> 'Channel':
r"""Return the 'sharp' transpose of the superoperator.
The transpose :math:`S^\#` switches the two covariant (bra)
indices of the superoperator. (Which in our representation
are the 2nd and 3rd super-indices)
If :math:`S^\#` is Hermitian, then :mat... | python | def sharp(self) -> 'Channel':
r"""Return the 'sharp' transpose of the superoperator.
The transpose :math:`S^\#` switches the two covariant (bra)
indices of the superoperator. (Which in our representation
are the 2nd and 3rd super-indices)
If :math:`S^\#` is Hermitian, then :mat... | [
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234,867 | rigetti/quantumflow | quantumflow/ops.py | Channel.choi | def choi(self) -> bk.BKTensor:
"""Return the Choi matrix representation of this super
operator"""
# Put superop axes in [ok, ib, ob, ik] and reshape to matrix
N = self.qubit_nb
return bk.reshape(self.sharp.tensor, [2**(N*2)] * 2) | python | def choi(self) -> bk.BKTensor:
"""Return the Choi matrix representation of this super
operator"""
# Put superop axes in [ok, ib, ob, ik] and reshape to matrix
N = self.qubit_nb
return bk.reshape(self.sharp.tensor, [2**(N*2)] * 2) | [
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234,868 | rigetti/quantumflow | quantumflow/ops.py | Channel.evolve | def evolve(self, rho: Density) -> Density:
"""Apply the action of this channel upon a density"""
N = rho.qubit_nb
qubits = rho.qubits
indices = list([qubits.index(q) for q in self.qubits]) + \
list([qubits.index(q) + N for q in self.qubits])
tensor = bk.tensormul(se... | python | def evolve(self, rho: Density) -> Density:
"""Apply the action of this channel upon a density"""
N = rho.qubit_nb
qubits = rho.qubits
indices = list([qubits.index(q) for q in self.qubits]) + \
list([qubits.index(q) + N for q in self.qubits])
tensor = bk.tensormul(se... | [
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234,869 | rigetti/quantumflow | quantumflow/backend/eagerbk.py | fcast | def fcast(value: float) -> TensorLike:
"""Cast to float tensor"""
newvalue = tf.cast(value, FTYPE)
if DEVICE == 'gpu':
newvalue = newvalue.gpu() # Why is this needed? # pragma: no cover
return newvalue | python | def fcast(value: float) -> TensorLike:
"""Cast to float tensor"""
newvalue = tf.cast(value, FTYPE)
if DEVICE == 'gpu':
newvalue = newvalue.gpu() # Why is this needed? # pragma: no cover
return newvalue | [
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234,870 | rigetti/quantumflow | quantumflow/backend/eagerbk.py | astensor | def astensor(array: TensorLike) -> BKTensor:
"""Convert to product tensor"""
tensor = tf.convert_to_tensor(array, dtype=CTYPE)
if DEVICE == 'gpu':
tensor = tensor.gpu() # pragma: no cover
# size = np.prod(np.array(tensor.get_shape().as_list()))
N = int(math.log2(size(tensor)))
tensor =... | python | def astensor(array: TensorLike) -> BKTensor:
"""Convert to product tensor"""
tensor = tf.convert_to_tensor(array, dtype=CTYPE)
if DEVICE == 'gpu':
tensor = tensor.gpu() # pragma: no cover
# size = np.prod(np.array(tensor.get_shape().as_list()))
N = int(math.log2(size(tensor)))
tensor =... | [
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234,871 | rigetti/quantumflow | quantumflow/circuits.py | count_operations | def count_operations(elements: Iterable[Operation]) \
-> Dict[Type[Operation], int]:
"""Return a count of different operation types given a colelction of
operations, such as a Circuit or DAGCircuit
"""
op_count: Dict[Type[Operation], int] = defaultdict(int)
for elem in elements:
op_c... | python | def count_operations(elements: Iterable[Operation]) \
-> Dict[Type[Operation], int]:
"""Return a count of different operation types given a colelction of
operations, such as a Circuit or DAGCircuit
"""
op_count: Dict[Type[Operation], int] = defaultdict(int)
for elem in elements:
op_c... | [
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234,872 | rigetti/quantumflow | quantumflow/circuits.py | map_gate | def map_gate(gate: Gate, args: Sequence[Qubits]) -> Circuit:
"""Applies the same gate all input qubits in the argument list.
>>> circ = qf.map_gate(qf.H(), [[0], [1], [2]])
>>> print(circ)
H(0)
H(1)
H(2)
"""
circ = Circuit()
for qubits in args:
circ += gate.relabel(qubits)... | python | def map_gate(gate: Gate, args: Sequence[Qubits]) -> Circuit:
"""Applies the same gate all input qubits in the argument list.
>>> circ = qf.map_gate(qf.H(), [[0], [1], [2]])
>>> print(circ)
H(0)
H(1)
H(2)
"""
circ = Circuit()
for qubits in args:
circ += gate.relabel(qubits)... | [
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234,873 | rigetti/quantumflow | quantumflow/circuits.py | qft_circuit | def qft_circuit(qubits: Qubits) -> Circuit:
"""Returns the Quantum Fourier Transform circuit"""
# Kudos: Adapted from Rigetti Grove, grove/qft/fourier.py
N = len(qubits)
circ = Circuit()
for n0 in range(N):
q0 = qubits[n0]
circ += H(q0)
for n1 in range(n0+1, N):
... | python | def qft_circuit(qubits: Qubits) -> Circuit:
"""Returns the Quantum Fourier Transform circuit"""
# Kudos: Adapted from Rigetti Grove, grove/qft/fourier.py
N = len(qubits)
circ = Circuit()
for n0 in range(N):
q0 = qubits[n0]
circ += H(q0)
for n1 in range(n0+1, N):
... | [
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234,874 | rigetti/quantumflow | quantumflow/circuits.py | reversal_circuit | def reversal_circuit(qubits: Qubits) -> Circuit:
"""Returns a circuit to reverse qubits"""
N = len(qubits)
circ = Circuit()
for n in range(N // 2):
circ += SWAP(qubits[n], qubits[N-1-n])
return circ | python | def reversal_circuit(qubits: Qubits) -> Circuit:
"""Returns a circuit to reverse qubits"""
N = len(qubits)
circ = Circuit()
for n in range(N // 2):
circ += SWAP(qubits[n], qubits[N-1-n])
return circ | [
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234,875 | rigetti/quantumflow | quantumflow/circuits.py | zyz_circuit | def zyz_circuit(t0: float, t1: float, t2: float, q0: Qubit) -> Circuit:
"""Circuit equivalent of 1-qubit ZYZ gate"""
circ = Circuit()
circ += TZ(t0, q0)
circ += TY(t1, q0)
circ += TZ(t2, q0)
return circ | python | def zyz_circuit(t0: float, t1: float, t2: float, q0: Qubit) -> Circuit:
"""Circuit equivalent of 1-qubit ZYZ gate"""
circ = Circuit()
circ += TZ(t0, q0)
circ += TY(t1, q0)
circ += TZ(t2, q0)
return circ | [
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234,876 | rigetti/quantumflow | quantumflow/circuits.py | phase_estimation_circuit | def phase_estimation_circuit(gate: Gate, outputs: Qubits) -> Circuit:
"""Returns a circuit for quantum phase estimation.
The gate has an eigenvector with eigenvalue e^(i 2 pi phase). To
run the circuit, the eigenvector should be set on the gate qubits,
and the output qubits should be in the zero state.... | python | def phase_estimation_circuit(gate: Gate, outputs: Qubits) -> Circuit:
"""Returns a circuit for quantum phase estimation.
The gate has an eigenvector with eigenvalue e^(i 2 pi phase). To
run the circuit, the eigenvector should be set on the gate qubits,
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234,877 | rigetti/quantumflow | quantumflow/circuits.py | ghz_circuit | def ghz_circuit(qubits: Qubits) -> Circuit:
"""Returns a circuit that prepares a multi-qubit Bell state from the zero
state.
"""
circ = Circuit()
circ += H(qubits[0])
for q0 in range(0, len(qubits)-1):
circ += CNOT(qubits[q0], qubits[q0+1])
return circ | python | def ghz_circuit(qubits: Qubits) -> Circuit:
"""Returns a circuit that prepares a multi-qubit Bell state from the zero
state.
"""
circ = Circuit()
circ += H(qubits[0])
for q0 in range(0, len(qubits)-1):
circ += CNOT(qubits[q0], qubits[q0+1])
return circ | [
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234,878 | rigetti/quantumflow | quantumflow/circuits.py | Circuit.extend | def extend(self, other: Operation) -> None:
"""Append gates from circuit to the end of this circuit"""
if isinstance(other, Circuit):
self.elements.extend(other.elements)
else:
self.elements.extend([other]) | python | def extend(self, other: Operation) -> None:
"""Append gates from circuit to the end of this circuit"""
if isinstance(other, Circuit):
self.elements.extend(other.elements)
else:
self.elements.extend([other]) | [
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234,879 | rigetti/quantumflow | quantumflow/circuits.py | Circuit.run | def run(self, ket: State = None) -> State:
"""
Apply the action of this circuit upon a state.
If no initial state provided an initial zero state will be created.
"""
if ket is None:
qubits = self.qubits
ket = zero_state(qubits=qubits)
for elem in... | python | def run(self, ket: State = None) -> State:
"""
Apply the action of this circuit upon a state.
If no initial state provided an initial zero state will be created.
"""
if ket is None:
qubits = self.qubits
ket = zero_state(qubits=qubits)
for elem in... | [
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234,880 | rigetti/quantumflow | quantumflow/circuits.py | Circuit.asgate | def asgate(self) -> Gate:
"""
Return the action of this circuit as a gate
"""
gate = identity_gate(self.qubits)
for elem in self.elements:
gate = elem.asgate() @ gate
return gate | python | def asgate(self) -> Gate:
"""
Return the action of this circuit as a gate
"""
gate = identity_gate(self.qubits)
for elem in self.elements:
gate = elem.asgate() @ gate
return gate | [
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234,881 | rigetti/quantumflow | quantumflow/channels.py | join_channels | def join_channels(*channels: Channel) -> Channel:
"""Join two channels acting on different qubits into a single channel
acting on all qubits"""
vectors = [chan.vec for chan in channels]
vec = reduce(outer_product, vectors)
return Channel(vec.tensor, vec.qubits) | python | def join_channels(*channels: Channel) -> Channel:
"""Join two channels acting on different qubits into a single channel
acting on all qubits"""
vectors = [chan.vec for chan in channels]
vec = reduce(outer_product, vectors)
return Channel(vec.tensor, vec.qubits) | [
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234,882 | rigetti/quantumflow | quantumflow/channels.py | channel_to_kraus | def channel_to_kraus(chan: Channel) -> 'Kraus':
"""Convert a channel superoperator into a Kraus operator representation
of the same channel."""
qubits = chan.qubits
N = chan.qubit_nb
choi = asarray(chan.choi())
evals, evecs = np.linalg.eig(choi)
evecs = np.transpose(evecs)
assert np.al... | python | def channel_to_kraus(chan: Channel) -> 'Kraus':
"""Convert a channel superoperator into a Kraus operator representation
of the same channel."""
qubits = chan.qubits
N = chan.qubit_nb
choi = asarray(chan.choi())
evals, evecs = np.linalg.eig(choi)
evecs = np.transpose(evecs)
assert np.al... | [
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234,883 | rigetti/quantumflow | quantumflow/channels.py | Kraus.run | def run(self, ket: State) -> State:
"""Apply the action of this Kraus quantum operation upon a state"""
res = [op.run(ket) for op in self.operators]
probs = [asarray(ket.norm()) * w for ket, w in zip(res, self.weights)]
probs = np.asarray(probs)
probs /= np.sum(probs)
new... | python | def run(self, ket: State) -> State:
"""Apply the action of this Kraus quantum operation upon a state"""
res = [op.run(ket) for op in self.operators]
probs = [asarray(ket.norm()) * w for ket, w in zip(res, self.weights)]
probs = np.asarray(probs)
probs /= np.sum(probs)
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234,884 | rigetti/quantumflow | quantumflow/channels.py | Kraus.evolve | def evolve(self, rho: Density) -> Density:
"""Apply the action of this Kraus quantum operation upon a density"""
qubits = rho.qubits
results = [op.evolve(rho) for op in self.operators]
tensors = [rho.tensor * w for rho, w in zip(results, self.weights)]
tensor = reduce(add, tensor... | python | def evolve(self, rho: Density) -> Density:
"""Apply the action of this Kraus quantum operation upon a density"""
qubits = rho.qubits
results = [op.evolve(rho) for op in self.operators]
tensors = [rho.tensor * w for rho, w in zip(results, self.weights)]
tensor = reduce(add, tensor... | [
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234,885 | rigetti/quantumflow | quantumflow/channels.py | Kraus.H | def H(self) -> 'Kraus':
"""Return the complex conjugate of this Kraus operation"""
operators = [op.H for op in self.operators]
return Kraus(operators, self.weights) | python | def H(self) -> 'Kraus':
"""Return the complex conjugate of this Kraus operation"""
operators = [op.H for op in self.operators]
return Kraus(operators, self.weights) | [
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234,886 | rigetti/quantumflow | quantumflow/channels.py | UnitaryMixture.asgate | def asgate(self) -> Gate:
"""Return one of the composite Kraus operators at random with
the appropriate weights"""
return np.random.choice(self.operators, p=self.weights) | python | def asgate(self) -> Gate:
"""Return one of the composite Kraus operators at random with
the appropriate weights"""
return np.random.choice(self.operators, p=self.weights) | [
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234,887 | rigetti/quantumflow | quantumflow/visualization.py | _display_layers | def _display_layers(circ: Circuit, qubits: Qubits) -> Circuit:
"""Separate a circuit into groups of gates that do not visually overlap"""
N = len(qubits)
qubit_idx = dict(zip(qubits, range(N)))
gate_layers = DAGCircuit(circ).layers()
layers = []
lcirc = Circuit()
layers.append(lcirc)
un... | python | def _display_layers(circ: Circuit, qubits: Qubits) -> Circuit:
"""Separate a circuit into groups of gates that do not visually overlap"""
N = len(qubits)
qubit_idx = dict(zip(qubits, range(N)))
gate_layers = DAGCircuit(circ).layers()
layers = []
lcirc = Circuit()
layers.append(lcirc)
un... | [
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234,888 | rigetti/quantumflow | quantumflow/visualization.py | render_latex | def render_latex(latex: str) -> PIL.Image: # pragma: no cover
"""
Convert a single page LaTeX document into an image.
To display the returned image, `img.show()`
Required external dependencies: `pdflatex` (with `qcircuit` package),
and `poppler` (for `pdftocairo`).
Args:
A LaTeX... | python | def render_latex(latex: str) -> PIL.Image: # pragma: no cover
"""
Convert a single page LaTeX document into an image.
To display the returned image, `img.show()`
Required external dependencies: `pdflatex` (with `qcircuit` package),
and `poppler` (for `pdftocairo`).
Args:
A LaTeX... | [
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234,889 | rigetti/quantumflow | quantumflow/visualization.py | circuit_to_image | def circuit_to_image(circ: Circuit,
qubits: Qubits = None) -> PIL.Image: # pragma: no cover
"""Create an image of a quantum circuit.
A convenience function that calls circuit_to_latex() and render_latex().
Args:
circ: A quantum Circuit
qubits: Optional qubi... | python | def circuit_to_image(circ: Circuit,
qubits: Qubits = None) -> PIL.Image: # pragma: no cover
"""Create an image of a quantum circuit.
A convenience function that calls circuit_to_latex() and render_latex().
Args:
circ: A quantum Circuit
qubits: Optional qubi... | [
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234,890 | rigetti/quantumflow | quantumflow/visualization.py | _latex_format | def _latex_format(obj: Any) -> str:
"""Format an object as a latex string."""
if isinstance(obj, float):
try:
return sympy.latex(symbolize(obj))
except ValueError:
return "{0:.4g}".format(obj)
return str(obj) | python | def _latex_format(obj: Any) -> str:
"""Format an object as a latex string."""
if isinstance(obj, float):
try:
return sympy.latex(symbolize(obj))
except ValueError:
return "{0:.4g}".format(obj)
return str(obj) | [
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234,891 | rigetti/quantumflow | examples/eager_fit_gate.py | fit_zyz | def fit_zyz(target_gate):
"""
Tensorflow eager mode example. Given an arbitrary one-qubit gate, use
gradient descent to find corresponding parameters of a universal ZYZ
gate.
"""
assert bk.BACKEND == 'eager'
tf = bk.TL
tfe = bk.tfe
steps = 4000
dev = '/gpu:0' if bk.DEVICE == '... | python | def fit_zyz(target_gate):
"""
Tensorflow eager mode example. Given an arbitrary one-qubit gate, use
gradient descent to find corresponding parameters of a universal ZYZ
gate.
"""
assert bk.BACKEND == 'eager'
tf = bk.TL
tfe = bk.tfe
steps = 4000
dev = '/gpu:0' if bk.DEVICE == '... | [
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234,892 | rigetti/quantumflow | quantumflow/meta.py | print_versions | def print_versions(file: typing.TextIO = None) -> None:
"""
Print version strings of currently installed dependencies
``> python -m quantumflow.meta``
Args:
file: Output stream. Defaults to stdout.
"""
print('** QuantumFlow dependencies (> python -m quantumflow.meta) **')
print(... | python | def print_versions(file: typing.TextIO = None) -> None:
"""
Print version strings of currently installed dependencies
``> python -m quantumflow.meta``
Args:
file: Output stream. Defaults to stdout.
"""
print('** QuantumFlow dependencies (> python -m quantumflow.meta) **')
print(... | [
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``> python -m quantumflow.meta``
Args:
file: Output stream. Defaults to stdout. | [
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234,893 | rigetti/quantumflow | examples/tensorflow_fit_gate.py | fit_zyz | def fit_zyz(target_gate):
"""
Tensorflow example. Given an arbitrary one-qubit gate, use gradient
descent to find corresponding parameters of a universal ZYZ gate.
"""
assert bk.BACKEND == 'tensorflow'
tf = bk.TL
steps = 4000
t = tf.get_variable('t', [3])
gate = qf.ZYZ(t[0], t[1],... | python | def fit_zyz(target_gate):
"""
Tensorflow example. Given an arbitrary one-qubit gate, use gradient
descent to find corresponding parameters of a universal ZYZ gate.
"""
assert bk.BACKEND == 'tensorflow'
tf = bk.TL
steps = 4000
t = tf.get_variable('t', [3])
gate = qf.ZYZ(t[0], t[1],... | [
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234,894 | rigetti/quantumflow | quantumflow/decompositions.py | zyz_decomposition | def zyz_decomposition(gate: Gate) -> Circuit:
"""
Returns the Euler Z-Y-Z decomposition of a local 1-qubit gate.
"""
if gate.qubit_nb != 1:
raise ValueError('Expected 1-qubit gate')
q, = gate.qubits
U = asarray(gate.asoperator())
U /= np.linalg.det(U) ** (1/2) # SU(2)
if ab... | python | def zyz_decomposition(gate: Gate) -> Circuit:
"""
Returns the Euler Z-Y-Z decomposition of a local 1-qubit gate.
"""
if gate.qubit_nb != 1:
raise ValueError('Expected 1-qubit gate')
q, = gate.qubits
U = asarray(gate.asoperator())
U /= np.linalg.det(U) ** (1/2) # SU(2)
if ab... | [
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234,895 | rigetti/quantumflow | quantumflow/decompositions.py | kronecker_decomposition | def kronecker_decomposition(gate: Gate) -> Circuit:
"""
Decompose a 2-qubit unitary composed of two 1-qubit local gates.
Uses the "Nearest Kronecker Product" algorithm. Will give erratic
results if the gate is not the direct product of two 1-qubit gates.
"""
# An alternative approach would be t... | python | def kronecker_decomposition(gate: Gate) -> Circuit:
"""
Decompose a 2-qubit unitary composed of two 1-qubit local gates.
Uses the "Nearest Kronecker Product" algorithm. Will give erratic
results if the gate is not the direct product of two 1-qubit gates.
"""
# An alternative approach would be t... | [
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Uses the "Nearest Kronecker Product" algorithm. Will give erratic
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234,896 | rigetti/quantumflow | quantumflow/decompositions.py | canonical_coords | def canonical_coords(gate: Gate) -> Sequence[float]:
"""Returns the canonical coordinates of a 2-qubit gate"""
circ = canonical_decomposition(gate)
gate = circ.elements[6] # type: ignore
params = [gate.params[key] for key in ('tx', 'ty', 'tz')]
return params | python | def canonical_coords(gate: Gate) -> Sequence[float]:
"""Returns the canonical coordinates of a 2-qubit gate"""
circ = canonical_decomposition(gate)
gate = circ.elements[6] # type: ignore
params = [gate.params[key] for key in ('tx', 'ty', 'tz')]
return params | [
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234,897 | rigetti/quantumflow | quantumflow/decompositions.py | _eig_complex_symmetric | def _eig_complex_symmetric(M: np.ndarray) -> Tuple[np.ndarray, np.ndarray]:
"""Diagonalize a complex symmetric matrix. The eigenvalues are
complex, and the eigenvectors form an orthogonal matrix.
Returns:
eigenvalues, eigenvectors
"""
if not np.allclose(M, M.transpose()):
raise np.... | python | def _eig_complex_symmetric(M: np.ndarray) -> Tuple[np.ndarray, np.ndarray]:
"""Diagonalize a complex symmetric matrix. The eigenvalues are
complex, and the eigenvectors form an orthogonal matrix.
Returns:
eigenvalues, eigenvectors
"""
if not np.allclose(M, M.transpose()):
raise np.... | [
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Returns:
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234,898 | rigetti/quantumflow | examples/qaoa_maxcut.py | maxcut_qaoa | def maxcut_qaoa(
graph,
steps=DEFAULT_STEPS,
learning_rate=LEARNING_RATE,
verbose=False):
"""QAOA Maxcut using tensorflow"""
if not isinstance(graph, nx.Graph):
graph = nx.from_edgelist(graph)
init_scale = 0.01
init_bias = 0.5
init_beta = normal(loc=init_bi... | python | def maxcut_qaoa(
graph,
steps=DEFAULT_STEPS,
learning_rate=LEARNING_RATE,
verbose=False):
"""QAOA Maxcut using tensorflow"""
if not isinstance(graph, nx.Graph):
graph = nx.from_edgelist(graph)
init_scale = 0.01
init_bias = 0.5
init_beta = normal(loc=init_bi... | [
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234,899 | rigetti/quantumflow | quantumflow/gates.py | identity_gate | def identity_gate(qubits: Union[int, Qubits]) -> Gate:
"""Returns the K-qubit identity gate"""
_, qubits = qubits_count_tuple(qubits)
return I(*qubits) | python | def identity_gate(qubits: Union[int, Qubits]) -> Gate:
"""Returns the K-qubit identity gate"""
_, qubits = qubits_count_tuple(qubits)
return I(*qubits) | [
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