Noisy measurements produce faster results

Details Noisy measurements produce faster results Noisy measurements produce faster results

2011-09-21

arxiv.org/abs/1109.4613v6

Physics

Quantum Physics

REVISED VERSION: 15 pages, 2 figures

Scientific paper

We consider the problem of a finite-time measurement using the Lindblad equation to find analytical results, valid for weak system-environment coupling, obtained for a two-level system in contact with a measurer (Markovian interaction) and a thermal bath (non-Markovian interaction). Analysing the behavior of the coherences we obtained an expression for the maximal duration of the measurement which coincides with the case of no system-environment interaction. The validity of the expression is confirmed by the behavior of the coherences in the case of strong system-environment coupling, found numerically, showing that the environmental noise contributes to a faster measurement.

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