Thermodynamics of information exchange between two coupled quantum dots

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Details

Original languageEnglish
Article number032147
Pages (from-to)1-7
JournalPhysical Review E
Volume93
Issue number3
Publication statusPublished - 28 Mar 2016
MoE publication typeA1 Journal article-refereed

Researchers

Research units

  • University of Tokyo

Abstract

We propose a setup based on two coupled quantum dots where thermodynamics of a measurement can be quantitatively characterized. The information obtained in the measurement can be utilized by performing feedback in a manner apparently breaking the second law of thermodynamics. In this way the setup can be operated as a Maxwell's demon, where both the measurement and feedback are performed separately by controlling an external parameter. This is analogous to the case of the original Szilard engine. Since the setup contains both the microscopic demon and the engine itself, the operation of the whole measurement-feedback cycle can be explained in detail at the level of single realizations. In addition, we derive integral fluctuation relations for both the bare and coarse-grained entropy productions in the setup.

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