New answers tagged decoherence
0
Lets start with measuring circuits. With link to user245427 answer, you should construct following circuits in composer followingly:
T1 (relaxation time)
T1 is constant connected with spontaneous relaxation from state $|1\rangle$ to state $|0\rangle$. So firstly apply $X$ gate on a qubit to change its state from $|0\rangle$ to $|1\rangle$, then apply a few ...
1
In addition to backend.properties() described above, you can go to https://quantum-computing.ibm.com, click a machine, then click "Download Calibrations".
3
The length of all backend basis gates is available from backend.properties().gate_length. For example
properties = backend.properties()
id_gate_length_qo = properties.gate_length('id', 0)
2
I cannot give you a complete answer(I am not too familiar with the IBM quantum tools) however I might be able to give you a few hints from a NMR/EPR perspective.
In magnetic resonance T2 is commonly measured by generating a spin coherence, and refocusing at progressively longer times then measuring a spin echo.
In quantum gate language that would be: ...
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You will need to know how long it takes for each gate of the circuit to be performed. Then the decoherence error rate is simply $$e^{t_{gate}/t_{decoherence}}$$
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