Hans Singh

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Systematically increasing noise in a many body quantum system has recently been appreciated in experiments and theory as a useful and simple method to understand properties of the noiseless system. Typically these so-called zero noise extrapolation (ZNE) schemes involve increasing noise in a system, evaluating observables at each value of noise and then extrapolating this data set to zero noise. In practice these schemes work surprisingly well despite having little theoretical guarantees of success in the presence of generic noise. However using ZNE presents an issue when extracting transport properties because—strictly speaking—no transport occurs at any non-zero noise strength since generic noise breaks any underlying conservation laws. In this talk, I will show how ZNE can still be used to extract transport properties, highlight when it can fail, and argue that, when successful, the noise dependence also contains additional universal information about transport.

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MPI PKS Dresden
0.02
Contact: Silvia Pappalardi