I am having trouble understanding how the transpiler works in IBM quantum computers. I am studying the spatial noise correlation between two qubits in an IBM Q device. For that, I don't want the transpiler to change my input circuit. Is it possible to overwrite the transpiler? Can someone explain how the transpiler works?
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$\begingroup$ I have asked a question before(quantumcomputing.stackexchange.com/questions/15045/…) and it is alike your problem, maybe the answers are helpful. $\endgroup$– Yitian WangCommented Dec 11, 2020 at 1:05
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When transpiling you can set the optimization level to 0, to prevent the transpiler from doing anything but unrolling to the natural basis gates of the device, eg., circuit = transpile(circuit, backend, optimization_level=0).
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$\begingroup$ In addition to unrolling to the device's basis gates, it may also change the circuit in order to fit the device's connectivity $\endgroup$ Commented Dec 11, 2020 at 9:27
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$\begingroup$ Information about the transpiler: qiskit.org/documentation/apidoc/transpiler.html and qiskit.org/documentation/tutorials/circuits_advanced/… $\endgroup$ Commented Dec 11, 2020 at 9:30