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cirq_google.calibration.make_zeta_chi_gamma_compensation_for_moments

Compensates circuit moments against errors in zeta, chi and gamma angles.

cirq_google.calibration.make_zeta_chi_gamma_compensation_for_moments(
    circuit: Union[cirq.Circuit, cirq_google.calibration.CircuitWithCalibration],
    characterizations: List[cirq_google.calibration.PhasedFSimCalibrationResult],
    *,
    gates_translator: Callable[[cirq.Gate], Optional[PhaseCalibratedFSimGate]] = cirq_google.calibration.phased_fsim.try_convert_gate_to_fsim,
    merge_subsets: bool = True,
    permit_mixed_moments: bool = False
) -> cirq_google.calibration.CircuitWithCalibration

This method creates a new circuit with a single-qubit Z gates added in a such way so that zeta, chi and gamma angles discovered by characterizations are cancelled-out and set to 0.

This function preserves a moment structure of the circuit. All single qubit gates appear on new moments in the final circuit.

circuit Circuit to compensate or instance of CircuitWithCalibration (likely returned from prepare_characterization_for_moments) whose mapping argument corresponds to the results in the characterizations argument. If circuit is passed then the method will attempt to match the circuit against a given characterizations. This step is can be skipped by passing the pre-calculated instance of CircuitWithCalibration.
characterizations List of characterization results (likely returned from run_calibrations). This should correspond to the circuit and mapping in the circuit_with_calibration argument.
gates_translator Function that translates a gate to a supported FSimGate which will undergo characterization. Defaults to sqrt_iswap_gates_translator.
merge_subsets Whether to allow for matching moments which are subsets of the characterized moments. This option is only used when instance of Circuit is passed as circuit.
permit_mixed_moments Whether to allow a mix of two-qubit gates with other irrelevant single-qubit gates.

Calibrated circuit together with its calibration metadata in CircuitWithCalibration object. The calibrated circuit has single-qubit Z gates added which compensates for the true gates imperfections. The moment to calibration mapping is updated for the new circuit so that successive calibrations could be applied.