Fig. 2: The median quality of recovery of one 2-qubit coupling using interpolation methods and those based on numerical derivatives30,31,32 as a function of the initial time.
From: Efficient and robust estimation of many-qubit Hamiltonians
We assumed that the total time of the experiment is fixed. That is, we let the initial time times the total number of samples for each time step to be a constant (107 for this plot). We used the expectation value of 40 equally spaced times which had the same distance between each other as the initial time. For each initial time, we simulated 1000 instances of the recovery protocol, always adding shot noise with the same standard deviation to the data. The dots correspond to the median quality of recovery, whereas the lower and upper end correspond to the 25 and 75 percentile. We ran the simulation on a system with 16 qubits.
