Optimal feedback scheme and universal time scaling for Hamiltonian parameter estimation.

Abstract

Time is a valuable resource and it is expected that a longer time period should lead to better precision in Hamiltonian parameter estimation. However, recent studies in quantum metrology have shown that in certain cases more time may even lead to worse estimations, which puts this intuition into question. In this Letter we show that by including feedback… (More)
DOI: 10.1103/PhysRevLett.115.110401

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