The physics of forgetting: Landauer's erasure principle and information theory

Details The physics of forgetting: Landauer's erasure principle and information theory The physics of forgetting: Landauer's erasure principle and information theory

2001-03-19

arxiv.org/abs/quant-ph/0103108v1

Contemporary Physics 42, 25 - 60 (2001)

Physics

Quantum Physics

36 pages, 13 figures, Very basic introductory article for Contemporary Physics

Scientific paper

10.1080/00107510010018916

This article discusses the concept of information and its intimate relationship with physics. After an introduction of all the necessary quantum mechanical and information theoretical concepts we analyze Landauer's principle that states that the erasure of information is inevitably accompanied by the generation of heat. We employ this principle to rederive a number of results in classical and quantum information theory whose rigorous mathematical derivations are difficult. This demonstrates the usefulness of Landauer's principle and provides an introduction to the physical theory of information.

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