How can I find the mapping between logical qubits and physical qubits in IBM Quantum Composer after running a job?

How can I find the mapping between logical qubits and physical qubits in IBM Quantum Composer after running a job? Ask Question Asked 4 days ago Modified 4 days ago Viewed 31 times 2 I executed a 3-qubit Grover-based QRNG circuit on IBM Quantum Composer and obtained the transpiled OpenQASM and backend calibration data. From the OpenQASM I can see the measurement mapping: measure q[2] -> c[0]; measure q[0] -> c[1]; measure q[1] -> c[2]; I also have backend calibration data containing readout error probabilities for all physical qubits (e.g., qubits 112, 113, 119, 121, 125, 127, 131, 133, 146, etc.). I would like to perform readout error mitigation (REM) using the calibration data. For that, I need to know which physical qubits correspond to the logical qubits: q[0] q[1] q[2] The topology view shows the qubits used by the transpiled circuit, but I cannot find the exact logical-to-physical mapping. Is there a way in IBM Quantum Composer or Job Details to determine something like: q[0] → physical qubit X q[1] → physical qubit Y q[2] → physical qubit Z Can this information be extracted from the transpiled circuit, job metadata, layout information, or any other Composer view? I am specifically trying to construct the correct readout calibration matrix for matrix-based REM. qiskitquantum-stateprogrammingibm-q-experienceibm-quantum-devices Share Improve this question Follow asked May 29 at 7:33 JANEMARIA ROY 211 1 bronze badge New contributor 2 Hi and welcome to QCSE! Does this answer your question? –  Tristan Nemoz ♦ Commented May 29 at 12:12 Add a comment Know someone who can answer? Share a link to this question via email, Twitter, or Facebook. 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