2017•Physical Review AOpen access

Past observable dynamics of a continuously monitored qubit

Luis Pedro García-Pintos, Justin Dressel

Abstract

The role of intrinsic postselection is analyzed for individual stochastic quantum measurement records of a continuously monitored observable. The measurement operators and linearized limits of the past collected measurement are outlined, linking together smoothing, weak measurements, and the information contained in the noisy record with simple formulas.

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Key concepts: Postselection, Observable, Weak measurement, Smoothing, Qubit, Statistical physics, Simple (philosophy), Quantum measurement