pygsti.extras.idletomography.idtcore.affine_jac_obs_element

pygsti.extras.idletomography.idtcore.affine_jac_obs_element#

affine_jac_obs_element(prep, error, observable)#

Computes the Jacobian matrix element for a Affine error: how the expectation value of observable changes with respect to the rate of error when preparing state prep.

Note: Affine error maps leave qubits corresponging to I’s in error alone. An affine error is defined as replacing portions of the density matrix corresponding to non-trivial Pauli operators with those operators.

Parameters:

  • prep (NQPauliState) – The state that is prepared.

  • error (NQPauliOp) – The type (as a pauli operator) of Affine error.

  • observable (NQPauliOp) – The observable whose expectation value is measured.

Return type:

float