什么是熵？ - SegmentFault 思否

什么是熵？

发布于 7 月 24 日

Summary: The author wrote a little book about entropy titled What is Entropy?. It's an expanded version of a short course on entropy taught via tweets on Twitter (though the title "92 Tweets on Entropy" was considered not lasting). The book explains various entropy-related concepts like information, Shannon and Gibbs entropy, maximum entropy principle, Boltzmann distribution, etc. It focuses on the entropy of hydrogen gas at room temperature and pressure (about 23 unknown bits per molecule) and avoids the second law of thermodynamics and entropy's roles in other fields. It contains a lot of math and has acknowledgments to Jacopo Bertolotti and others. It was posted on July 20th, 2024 and is in the [physics] and [probability] categories.
Main points:
- Wrote a book on entropy in tweet form.
- Focuses on entropy of hydrogen gas.
- Avoids some thermodynamic aspects.
- Full of math.
- Has acknowledgments.
Key information:
- Book title: [What is Entropy?]
- Animation credit: Jacopo Bertolotti
- Posted date: July 20th, 2024
- Categories: [physics], [probability]
Important details:
- Considered alternative title "92 Tweets on Entropy" but rejected.
- Avoided second law of thermodynamics and entropy in biology/black hole physics.
- Planck's constant appears in formulas for entropy of classical systems.
- Math details focus on making concepts precise and looking at counterexamples.

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