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Phys. Rev. Lett. 102, 250602 (2009) [4 pages]

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

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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

See Also: Erratum

Received 24 September 2008; revised 15 April 2009; published 24 June 2009

See accompanying Physics Synopsis

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.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.250602
DOI:
10.1103/PhysRevLett.102.250602
PACS:
05.70.Ln, 03.67.−a, 05.30.−d

See Also

Comment: Raoul Dillenschneider and Eric Lutz, Comment on “Minimal Energy Cost for Thermodynamic Information Processing: Measurement and Information Erasure”, Phys. Rev. Lett. 104, 198903 (2010).

Erratum: Takahiro Sagawa and Masahito Ueda, Erratum: Minimal Energy Cost for Thermodynamic Information Processing: Measurement and Information Erasure [Phys. Rev. Lett. 102, 250602 (2009)], Phys. Rev. Lett. 106, 189901 (2011).

 
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