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cirq.sim.ActOnStabilizerCHFormArgs

Wrapper around a stabilizer state in CH form for the act_on protocol.

Inherits From: ActOnStabilizerArgs, ActOnArgs, OperationTarget

state The StabilizerStateChForm 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.
log_of_measurement_results A mutable object that measurements are being recorded into.
initial_state The initial state for the simulation. This can be a full CH form passed by reference which will be modified inplace, or a big-endian int in the computational basis. If the state is an integer, qubits must be provided in order to determine array sizes.
classical_data The shared classical data container for this simulation.

ValueError If initial state is an integer but qubits are not provided.

allows_factoring Subclasses that allow factorization should override this.
can_represent_mixed_states

classical_data The shared classical data container for this simulation..
ignore_measurement_results

log_of_measurement_results Gets the log of measurement results.
prng

qubit_map

qubits Gets the qubit order maintained by this target.
state

Methods

apply_operation

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copy

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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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Creates a final merged state.

factor

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Splits two state spaces after a measurement or reset.

get_axes

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kronecker_product

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Joins two state spaces together.

measure

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Measures the qubits and records to log_of_measurement_results.

Any bitmasks will be applied to the measurement record. If self._ignore_measurement_results is set, it dephases instead of measuring, and no measurement result will be logged.

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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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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Samples the state value.

swap

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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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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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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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Gets the item associated with the qubit.

__iter__

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Iterates the keys of the mapping.

__len__

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Gets the number of items in the mapping.