Journal of Computational Electronics

, Volume 15, Issue 1, pp 343–346 | Cite as

Response to “Comment on ‘Zero and negative energy dissipation at information-theoretic erasure”’

  • Laszlo Bela Kish
  • Claes-Göran Granqvist
  • Sunil P. Khatri
  • Ferdinand Peper


We prove that statistical information-theoretic quantities, such as information entropy, cannot generally be interrelated with the lower limit of energy dissipation during information erasure. We also point out that, in deterministic and error-free computers, the information entropy of memories does not change during erasure because its value is always zero. On the other hand, for information-theoretic erasure—i.e., “thermalization”/randomization of the memory—the originally zero information entropy (with deterministic data in the memory) changes after erasure to its maximum value, 1 bit/memory bit, while the energy dissipation is still positive, even at parameters for which the thermodynamic entropy within the memory cell does not change. Information entropy does not convert to thermodynamic entropy and to the related energy dissipation; they are quantities of different physical nature. Possible specific observations (if any) indicating convertibility are at most fortuitous and due to the disregard of additional processes that are present.


Information Erasure Switching Energy dissipation Non-validity of Landauer’s theorem 



LK appreciates extensive discussions with Neal Anderson. Discussions with Tamas Horvath, Krishna Narayanan and Fred Green are also appreciated.


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Laszlo Bela Kish
    • 1
  • Claes-Göran Granqvist
    • 2
  • Sunil P. Khatri
    • 1
  • Ferdinand Peper
    • 3
  1. 1.Department of Electrical and Computer EngineeringTexas A&M UniversityCollege StationUSA
  2. 2.Department of Engineering Sciences, The Ångström LaboratoryUppsala UniversityUppsalaSweden
  3. 3.CiNet, NICT, and Osaka UniversitySuitaJapan

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