cirq.ProductState

A quantum state that is a tensor product of one qubit states.

cirq.ProductState(
    states=None
)

For example, the |00⟩ state is cirq.KET_ZERO(q0) * cirq.KET_ZERO(q1). The |+⟩ state is a length-1 tensor product state and can be constructed with cirq.KET_PLUS(q0).

qubits

states Dataclass field

Methods

projector

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projector(
    qubit_order: (cirq.QubitOrder | None) = None
) -> np.ndarray

The projector associated with this state expressed as a matrix.

This is |s⟩⟨s| where |s⟩ is this state.

state_vector

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state_vector(
    qubit_order: (cirq.QubitOrder | None) = None
) -> np.ndarray

The state-vector representation of this state.

__eq__

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__eq__(
    other
) -> bool

Return self==value.

__getitem__

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__getitem__(
    qubit: cirq.Qid
) -> _NamedOneQubitState

Return the _NamedOneQubitState at the given qubit.

__iter__

View source

__iter__() -> Iterator[tuple[cirq.Qid, _NamedOneQubitState]]

__len__

View source

__len__() -> int

__mul__

View source

__mul__(
    other: cirq.ProductState
) -> cirq.ProductState