unitary_gate_infidelity¶
- py_ste.unitary_gate_infidelity(gate: ndarray, target: ndarray) float¶
Computes the gate infidelity between a gate and a target gate:
where \(\texttt{dim}\) is the dimension of the Hilbert space the gates act upon.\[ \mathcal I(\texttt{gate}, \texttt{target}) \coloneqq 1-\frac{ \left|\Tr\left[\texttt{target}^\dagger \cdot \texttt{gate}\right]\right|^2 +\texttt{dim}}{\texttt{dim}(\texttt{dim}+1)}, \]- Parameters:
gate (NDArray[Shape[dim, dim], scalar]) – The gate to compute the infidelity of.
target (NDArray[Shape[dim, dim], scalar]) – The target gate to compute the infidelity with respect to.
- Returns:
The gate infidelity, \(\mathcal I(\texttt{gate}, \texttt{target})\).
- Return type:
float
Note
This function is a wrapper around the C++ function
Suzuki_Trotter_Evolver::unitary_gate_infidelity().