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arXiv · 1610.02697

Analysis of the conditional average and conditional variance of dissipated energy in the driven spin-boson model

Philip Wollfarth·Yasuhiro Utsumi·Alexander Shnirman
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Abstract

We investigate the conditional average and the conditional variance of dissipated energy considering, as a prototypical example, a driven spin-boson system. We follow a measurement protocol in which the spin is prepared in a certain initial state before undergoing a periodic driving. Subsequently, the spin is projected onto a post-selected final state. We compare the conditional average of dissipated energy to the lower bound which directly follows from the well known fluctuation relations. We further report that a special selection of the initial (pre-selected) and final (post-selected) spin states leads to an enhanced energy emission with simultaneous noise suppression at driving times of order of the relaxation time.

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Philip Wollfarth, Yasuhiro Utsumi, Alexander Shnirman. 2016-10-09. Analysis of the conditional average and conditional variance of dissipated energy in the driven spin-boson model. https://doi.org/10.1103/physrevb.96.064302

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