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Minimal Energy Cost for Thermodynamic Information Processing: Measurement and Information Erasure

Takahiro Sagawa and Masahito Ueda
Phys. Rev. Lett. 102, 250602 – Published 24 June 2009; Erratum Phys. Rev. Lett. 106, 189901 (2011)
Physics logo See Synopsis: The demon is in the details

Abstract

The fundamental lower bounds on the thermodynamic energy cost of measurement and information erasure are determined. The lower bound on the erasure validates Landauer’s principle for a symmetric memory; for other cases, the bound indicates the breakdown of the principle. Our results constitute the second law of “information thermodynamics,” in which information content and thermodynamic variables are treated on an equal footing.

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  • Received 24 September 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.250602

©2009 American Physical Society

Erratum

Synopsis

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The demon is in the details

Published 29 June 2009

In the theory of statistical information processing, what is the minimum amount of energy needed to make a measurement and then erase its memory?

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Authors & Affiliations

Takahiro Sagawa1 and Masahito Ueda1,2

  • 1Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8654, Japan
  • 2ERATO Macroscopic Quantum Control Project, JST, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan

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See Also

Sagawa and Ueda Reply:

Takahiro Sagawa and Masahito Ueda
Phys. Rev. Lett. 104, 198904 (2010)

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Issue

Vol. 102, Iss. 25 — 26 June 2009

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