Landauer’s erasure principle in a squeezed thermal memory

Jan Andre Klärs

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Abstract

Landauer’s erasure principle states that the irreversible erasure of a one-bit memory, embedded in a thermal environment, is accompanied with a work input of at least kTln2. Fundamental to that principle is the assumption that the physical states representing the two possible logical states are close to thermal equilibrium. Here, we propose and theoretically analyze a minimalist mechanical model of a one-bit memory operating with squeezed thermal states. It is shown that the Landauer energy bound is exponentially lowered with increasing squeezing factor. Squeezed thermal states, which may naturally arise in digital electronic circuits operating in a pulse-driven fashion, thus can be exploited to reduce the fundamental energy costs of an erasure operation.
Original languageEnglish
Article number040602
Number of pages5
JournalPhysical review letters
Volume122
Issue number4
DOIs
Publication statusPublished - 28 Jan 2019

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thermal environments
digital electronics
compressing
costs
energy
pulses

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Landauer’s erasure principle in a squeezed thermal memory. / Klärs, Jan Andre.

In: Physical review letters, Vol. 122, No. 4, 040602, 28.01.2019.

Research output: Contribution to journalArticleAcademicpeer-review

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AB - Landauer’s erasure principle states that the irreversible erasure of a one-bit memory, embedded in a thermal environment, is accompanied with a work input of at least kTln2. Fundamental to that principle is the assumption that the physical states representing the two possible logical states are close to thermal equilibrium. Here, we propose and theoretically analyze a minimalist mechanical model of a one-bit memory operating with squeezed thermal states. It is shown that the Landauer energy bound is exponentially lowered with increasing squeezing factor. Squeezed thermal states, which may naturally arise in digital electronic circuits operating in a pulse-driven fashion, thus can be exploited to reduce the fundamental energy costs of an erasure operation.

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JO - Physical review letters

JF - Physical review letters

SN - 0031-9007

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