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Is there a way to access the results of measurements 'per shot' performed on a backend such as one of the real IBM machines?

I know it can generate a histogram from the cumulative data, but I was wondering if it is possible to see what the measurement outcomes were for a particular shot out of the standard 1024.

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There is indeed. You just need to use get_memory() instead of get_counts() (and also use a memory=True flag in the execute function. It works with the local qasm simulator and the 5 qubit device (and not currently with the cloud-based qasm simulator or 14 qubit device).

Here's an example using it to generate a series of random bits.

q = QuantumRegister(1)
c = ClassicalRegister(1)
circ = QuantumCircuit(q, c)

circ.h(q)

circ.measure(q,c)

job = execute(circ, Aer.get_backend('qasm_simulator'), shots=10024, memory=True)
data = job.result().get_memory()
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  • $\begingroup$ Thank you, this worked when I changed to BasicAer. Are there plans to extend to the other IBM machines? $\endgroup$
    – Caleb GS
    Jan 30, 2019 at 11:43
  • $\begingroup$ All new machine will have it, I think. But for upgrades, I don’t know what the timescales are. $\endgroup$
    – James Wootton
    Jan 30, 2019 at 11:45

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