qrunch.quantum.estimators.third_party_estimators.qiskit_state_vector_estimator

Module containing an estimator which uses Qiskit’s state vector estimator.

Classes

Class for estimating observables using Qiskit's state vector simulation.

class QiskitStateVectorEstimator

Bases: Estimator

Class for estimating observables using Qiskit’s state vector simulation.

__init__(compiler: Compiler | None = None) → None

Initialize qiskit estimator using state vector simulation.

Parameters:: compiler (Compiler | None) – Compiler used for compiling the circuit into a UniversalGateCircuit.
Return type:: None

clear_cache() → None

Clear the measurement cache.

has_spin_particle_conservation() → bool

Return True, if the estimator is set to use spin particle conservation.

has_total_particle_conservation() → bool

Return True, if the estimator is set to use total particle conservation.

Estimate the value of the observables using the circuit state.

For each observable the following will be calculated: <circuit|observable|circuit>.

Parameters:

observables (Sequence[int | float | complex | Expression[PauliOperators]] | int | float | complex | Expression[PauliOperators] | Sequence[HermitianPauliSum] | HermitianPauliSum) – Observable(s) to be estimated.
circuits (Circuit | Sequence[Circuit]) – States to make estimation from.
shots (int | None) – number of shots or None if using a full state vector calculation.

Return type:

supports_shots_equals_none() → bool

Return whether the estimator supports shots = None.

The QiskitStateVectorEstimator can only estimate for shots equal to None.