The extension of the concept of entropy ———from thermal entropy to information entropy

LI Jun, WANG Zhicheng, WU Yuxuan, YUAN Zhi,

doi:10.16854 / j.cnki.1000 0712.200059

College Physics >

2020 , Vol. 39 >Issue 10: 29 - 33

DOI: https://doi.org/10.16854 / j.cnki.1000 0712.200059

The extension of the concept of entropy ———from thermal entropy to information entropy

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1. School of Physics，Harbin Institute of Technology，Harbin，Heilongjiang 150001，China; 2. School of Astronautics，Harbin Institute of Technology，Harbin，Heilongjiang 150001，China

Received date: 2020-03-02

Revised date: 2020-05-07

Online published: 2020-10-20

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Abstract

This paper first introduces the establishment process of the concepts of thermodynamic entropy and information entropy. Based on the application example of entropy in information theory，the correlation between thermodynamic entropy and information entropy is found. Finally，the relationship between information and energy， information entropy and thermodynamic entropy is discussed through Maxwell’s demon solved by Szilard，Landauer and modern experiments.

Key words： theory of entropy; thermal entropy; Maxwell’s demon; Landauer’s eraser

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LI Jun, WANG Zhicheng, WU Yuxuan, YUAN Zhi, . The extension of the concept of entropy ———from thermal entropy to information entropy[J]. College Physics, 2020 , 39(10) : 29 -33 . DOI: 10.16854 / j.cnki.1000 0712.200059

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