I've been coding QECC with qiskit recently. As I'm not very skilled in programming I encountered a lot of questions.
Now I'm trying to generate the logical error rate against physical error rate graph using qiskit. If I understand correctly, a logical error is one that anticommutes with logical operators, e.g. for the 7-qubit Steane code, X^7 and Z^7.
When I checked out other people's codes, they generally apply Pauli errors to gates, and track the propagation, at the end of the QECC circuit they obtain a Pauli operator, then check if it commutes with logical X and Z.
But for Qiskit this cannot be done ... what I'm getting is a statevector instead of specific error operator. How do I obtain logical error rate in this case?