Taper an operator based on the z2_symmetries info and sector defined by tapering_values. The tapering_values will be stored into the resulted operator for a record.
The tapering is a two-step algorithm which first converts the operator into a
PauliSumOpwith same eigenvalues but where some qubits are only acted upon with the Pauli operators I or X. The number M of these redundant qubits is equal to the number M of identified symmetries.
The second step of the reduction consists in replacing these qubits with the possible eigenvalues of the corresponding Pauli X, giving 2^M new operators with M less qubits. If an eigenvalue sector was previously identified for the solution, then this reduces to 1 new operator with M less qubits.
PauliSumOp) – the to-be-tapered operator
- Type renvoyé
If tapering_values is None
OpflowError – Z2 symmetries, single qubit pauli and single qubit list cannot be empty