Universal Bound on Energy Cost of Bit Reset in Finite Time

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Article numberA37
Journal / PublicationPhysical Review Letters
Volume127
Issue number19
Online published1 Nov 2021
Publication statusPublished - 5 Nov 2021
Externally publishedYes

Abstract

We consider how the energy cost of bit reset scales with the time duration of the protocol. Bit reset necessarily takes place in finite time, where there is an extra penalty on top of the quasistatic work cost derived by Landauer. This extra energy is dissipated as heat in the computer, inducing a fundamental limit on the speed of irreversible computers. We formulate a hardware-independent expression for this limit in the framework of stochastic processes. We derive a closed-form lower bound on the work penalty as a function of the time taken for the protocol and bit reset error. It holds for discrete as well as continuous systems, assuming only that the master equation respects detailed balance.

Citation Format(s)

Universal Bound on Energy Cost of Bit Reset in Finite Time. / Zhen, Yi-Zheng; Egloff, Dario; Modi, Kavan et al.
In: Physical Review Letters, Vol. 127, No. 19, A37, 05.11.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review