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

Analysis of the conditional average and conditional variance of dissipated energy in the driven... 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 postselected 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 (preselected) and final (postselected) spin states leads to an enhanced energy emission with simultaneous noise suppression at driving times of order of the relaxation time. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

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

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

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 postselected 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 (preselected) and final (postselected) 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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Publisher
The American Physical Society
Copyright
Copyright © ©2017 American Physical Society
ISSN
1098-0121
eISSN
1550-235X
D.O.I.
10.1103/PhysRevB.96.064302
Publisher site
See Article on Publisher Site

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 postselected 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 (preselected) and final (postselected) spin states leads to an enhanced energy emission with simultaneous noise suppression at driving times of order of the relaxation time.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Aug 7, 2017

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