quri_parts.qulacs.overlap_estimator module

quri_parts.qulacs.overlap_estimator.create_qulacs_vector_overlap_estimator() → Callable[[CircuitQuantumState | QuantumStateVector, CircuitQuantumState | QuantumStateVector], Estimate[float]]

Returns an OverlapEstimator that uses Qulacs vector simulator to calculate magnitude squared overlaps.

quri_parts.qulacs.overlap_estimator.create_qulacs_vector_overlap_weighted_sum_estimator(executor: Executor | None, concurrency: int = 1) → Callable[[Sequence[CircuitQuantumState | QuantumStateVector], Sequence[CircuitQuantumState | QuantumStateVector], Sequence[complex]], Estimate[complex]]

Returns an OverlapEstimator that uses Qulacs vector simulator to calculate magnitude squared overlaps.

quri_parts.qulacs.overlap_estimator.create_qulacs_vector_parametric_overlap_weighted_sum_estimator(estimator: Callable[[Sequence[CircuitQuantumState | QuantumStateVector], Sequence[CircuitQuantumState | QuantumStateVector], Sequence[complex]], Estimate[complex]]) → Callable[[tuple[ParametricCircuitQuantumState | ParametricQuantumStateVector, Sequence[Sequence[float]]], tuple[ParametricCircuitQuantumState | ParametricQuantumStateVector, Sequence[Sequence[float]]], Sequence[complex]], Estimate[complex]]

Create a ParametricOverlapWeightedSumEstimator from an ParametricOverlapWeightedSumEstimator that estimates weighted magnitude squared overlap values by qulacs statevector evaluation.