pygsti.extras.idletomography.idtcore.hamiltonian_jac_element

hamiltonian_jac_element(prep, error, observable)

Computes the Jacobian matrix element for a Hamiltonian error: how the expectation value of observable in state prep changes due to Hamiltonian error.

Parameters:

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

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

• observable (NQPauliOp) – The observable whose expectation value is measured. Note: giving a NQPauliState will be treated as an N-qubit Pauli operator whose sign is the product of the signs of the NQPauliState’s per-qubit basis signs.

Return type:

float