quri_parts.core.state.state module

class quri_parts.core.state.state.QuantumState(*args, **kwargs)

Bases: Protocol

QuantumState is an interface for classes representing a quantum state.

Since this interface is defined with Protocol, explicit inheritance of this class is not necessary when implementing a concrete class with this interface. (You can inherit it to indicate the interface if you want.)

abstract property qubit_count: int

Returns the qubit count of the state.

class quri_parts.core.state.state.CircuitQuantumState(*args, **kwargs)

Bases: QuantumState

CircuitQuantumState is an interface for classes representing a quantum state generated by applying a circuit to |00…0> state.

abstract property circuit: ImmutableQuantumCircuit

Circuit to build the quantum state.

abstract with_gates_applied(gates: NonParametricQuantumCircuit | Sequence[QuantumGate]) → CircuitQuantumState

Returns a new state with the gates applied.

The original state is not changed.

class quri_parts.core.state.state.CircuitQuantumStateMixin(n_qubits: int, circuit: NonParametricQuantumCircuit | None = None)

Bases: ABC

property circuit: ImmutableQuantumCircuit

Circuit to build the quantum state.

class quri_parts.core.state.state.GeneralCircuitQuantumState(n_qubits: int, circuit: NonParametricQuantumCircuit | None = None)

Bases: CircuitQuantumStateMixin, CircuitQuantumState

GeneralCircuitQuantumState represents a state given as a result of applying a circuit to |00…0> state.

property qubit_count: int

Returns the qubit count of the state.

with_gates_applied(gates: NonParametricQuantumCircuit | Sequence[QuantumGate]) → GeneralCircuitQuantumState

Returns a new state with the gates applied.

The original state is not changed.