CTMPExpvalMeasMitigator¶

class CTMPExpvalMeasMitigator(generators, rates, num_qubits=None, seed=None)[source]¶

Bases: qiskit.ignis.mitigation.expval.base_meas_mitigator.BaseExpvalMeasMitigator

N-qubit CTMP measurement error mitigator.

This class can be used with the qiskit.ignis.mitigation.expectation_value() function to apply measurement error mitigation of N-qubit measurement errors caused by one and two-body error generators. Expectation values can also be computed directly using the expectation_value() method.

For measurement mitigation to be applied the mitigator should be calibrated using the qiskit.ignis.mitigation.expval_meas_mitigator_circuits() function and qiskit.ignis.mitigation.ExpvalMeasMitigatorFitter class with the 'CTMP' mitigation method.

Initialize a TensorMeasurementMitigator

Methods

`assignment_fidelity`	Return the measurement assignment fidelity on the specified qubits.
`assignment_matrix`	Return the measurement assignment matrix for specified qubits.
`expectation_value`	Compute the mitigated expectation value of a diagonal observable.
`generator_matrix`	Return the generator matrix on the specified qubits.
`mitigation_matrix`	Return the measurement mitigation matrix for the specified qubits.
`mitigation_overhead`	Return the mitigation overhead for expectation value estimation.
`noise_strength`	Return the noise strength \(gamma\) on the specified qubits
`plot_assignment_matrix`	Matrix plot of the readout error assignment matrix.
`plot_mitigation_matrix`	Matrix plot of the readout error mitigation matrix.
`required_shots`	Return the number of shots required for expectation value estimation.
`seed`	Set the seed for the quantum state RNG.
`stddev_upper_bound`	Return an upper bound on standard deviation of expval estimator.