cirq.sim.CliffordTableauSimulationState

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State and context for an operation acting on a clifford tableau.

Inherits From: StabilizerSimulationState, SimulationState, SimulationStateBase

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Main aliases

cirq.CliffordTableauSimulationState, cirq.sim.clifford.CliffordTableauSimulationState, cirq.sim.clifford.clifford_tableau_simulation_state.CliffordTableauSimulationState

cirq.sim.CliffordTableauSimulationState(
    tableau: 'cirq.CliffordTableau',
    prng: Optional[np.random.RandomState] = None,
    qubits: Optional[Sequence['cirq.Qid']] = None,
    classical_data: Optional['cirq.ClassicalDataStore'] = None
)

Args
tableau	The CliffordTableau to act on. Operations are expected to perform inplace edits of this object.
qubits	Determines the canonical ordering of the qubits. This is often used in specifying the initial state, i.e. the ordering of the computational basis states.
prng	The pseudo random number generator to use for probabilistic effects.
classical_data	The shared classical data container for this simulation.

Attributes
allows_factoring	Subclasses that allow factorization should override this.
can_represent_mixed_states
classical_data
ignore_measurement_results	THIS FUNCTION IS DEPRECATED. IT WILL BE REMOVED IN cirq v0.16. Remove this call, it always returns False.
log_of_measurement_results	Gets the log of measurement results.
prng
qubit_map
qubits
state
tableau

Methods

apply_operation

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apply_operation(
    op: 'cirq.Operation'
)

copy

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copy(
    deep_copy_buffers: bool = True
) -> cirq.sim.simulation_state.TSelf

Creates a copy of the object.

Args
deep_copy_buffers	If True, buffers will also be deep-copied. Otherwise the copy will share a reference to the original object's buffers.

Returns
A copied instance.

create_merged_state

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create_merged_state() -> cirq.sim.simulation_state.TSelf

Creates a final merged state.

factor

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factor(
    qubits: Sequence['cirq.Qid'], *, validate=True, atol=1e-07, inplace=False
) -> Tuple[cirq.sim.simulation_state.TSelf, cirq.sim.simulation_state.TSelf]

Splits two state spaces after a measurement or reset.

get_axes

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get_axes(
    qubits: Sequence['cirq.Qid']
) -> List[int]

kronecker_product

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kronecker_product(
    other: cirq.sim.simulation_state.TSelf,
    *,
    inplace=False
) -> cirq.sim.simulation_state.TSelf

Joins two state spaces together.

measure

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measure(
    qubits: Sequence['cirq.Qid'], key: str, invert_mask: Sequence[bool]
)

Measures the qubits and records to log_of_measurement_results.

Any bitmasks will be applied to the measurement record.

Args
qubits	The qubits to measure.
key	The key the measurement result should be logged under. Note that operations should only store results under keys they have declared in a _measurement_key_names_ method.
invert_mask	The invert mask for the measurement.

Raises
ValueError	If a measurement key has already been logged to a key.

rename

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rename(
    q1: 'cirq.Qid', q2: 'cirq.Qid', *, inplace=False
)

Renames q1 to q2.

Args
q1	The qubit to rename.
q2	The new name.
inplace	True to rename the qubit in the current object, False to create a copy with the qubit renamed.

Returns
The original object with the qubits renamed if inplace is requested, or a copy of the original object with the qubits renamed otherwise.

Raises
ValueError	If the qubits are of different dimensionality.

sample

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sample(
    qubits: Sequence['cirq.Qid'],
    repetitions: int = 1,
    seed: 'cirq.RANDOM_STATE_OR_SEED_LIKE' = None
) -> np.ndarray

Samples the state value.

swap

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swap(
    q1: 'cirq.Qid', q2: 'cirq.Qid', *, inplace=False
)

Swaps two qubits.

This only affects the index, and does not modify the underlying state.

Args
q1	The first qubit to swap.
q2	The second qubit to swap.
inplace	True to swap the qubits in the current object, False to create a copy with the qubits swapped.

Returns
The original object with the qubits swapped if inplace is requested, or a copy of the original object with the qubits swapped otherwise.

Raises
ValueError	If the qubits are of different dimensionality.

transpose_to_qubit_order

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transpose_to_qubit_order(
    qubits: Sequence['cirq.Qid'], *, inplace=False
) -> cirq.sim.simulation_state.TSelf

Physically reindexes the state by the new basis.

Args
qubits	The desired qubit order.
inplace	True to perform this operation inplace.

Returns
The state with qubit order transposed and underlying representation updated.

Raises
ValueError	If the provided qubits do not match the existing ones.

with_qubits

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with_qubits(
    qubits
) -> cirq.sim.simulation_state.TSelf

Extend current state space with added qubits.

The state of the added qubits is the default value set in the subclasses. A new state space is created as the Kronecker product of the original one and the added one.

Args
qubits	The qubits to be added to the state space.

Regurns:

A new subclass object containing the extended state space.

__getitem__

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__getitem__(
    item: Optional['cirq.Qid']
) -> cirq.sim.simulation_state.TSelf

Gets the item associated with the qubit.

__iter__

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__iter__() -> Iterator[Optional['cirq.Qid']]

Iterates the keys of the mapping.

__len__

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__len__() -> int

Gets the number of items in the mapping.