qiskit.aqua.operators.converters.PauliBasisChange.construct_cnot_chain¶
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PauliBasisChange.construct_cnot_chain(diag_pauli_op1, diag_pauli_op2)[source]¶ Construct a
CircuitOp(orPauliOpif equal to the identity) which takes the eigenvectors ofdiag_pauli_op1to the eigenvectors ofdiag_pauli_op2, assuming both are diagonal (or performing this operation on their diagonalized Paulis implicitly if not). This works by the insight that the eigenvalue of a diagonal Pauli’s eigenvector is equal to or -1 if the parity is 1 and 1 if the parity is 0, or 1 - (2 * parity). Therefore, using CNOTs, we can write the parity of diag_pauli_op1’s significant bits onto some qubit, and then write out that parity onto diag_pauli_op2’s significant bits.- Parameters
diag_pauli_op1 (
PauliOp) – The originPauliOp.diag_pauli_op2 (
PauliOp) – The destinationPauliOp.
- Return type
PrimitiveOp- Returns
The
PrimitiveOpperforms the mapping.