香农熵与热力学熵是同一回事吗?
Are Shannon entropy and thermodynamic entropy the same thing?
形式相似但层次不同:香农熵度量信息的不确定性,热力学熵度量微观状态的混乱;朗道尔原理在“擦除信息须耗能”处把两者桥接起来。
They look alike but differ in level: Shannon entropy measures informational uncertainty, thermodynamic entropy measures microscopic disorder; Landauer's principle bridges them via the energy cost of erasing.
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
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出处备注:著录含书名,但缺版次 / 出版社 / 年份中的一部分,需编辑补全后才能做独立比对。
Jaynes,《信息论与统计力学》,Physical Review 106 (1957)
Jaynes, 'Information Theory and Statistical Mechanics', Physical Review 106 (1957)
#香农熵 #热力学熵 #信息
麦克斯韦妖与朗道尔原理如何闭合“信息与熵”的循环?
How do Maxwell's demon and Landauer's principle close the information-entropy loop?
妖靠获得分子信息来减熵,但记忆终须擦除,擦除按朗道尔极限放热,使总熵不减;信息因此被纳入热力学,计算机耗能有了下限。
The demon lowers entropy using information, but erasure costs Landauer heat, keeping total entropy up; information enters thermodynamics and sets a lower bound on computing energy.
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-03
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Bennett,《计算的热力学:评述》,International Journal of Theoretical Physics 21 (1982)
Bennett, 'The Thermodynamics of Computation - a Review', International Journal of Theoretical Physics 21 (1982)
独立核验依据 · Independent verification: 核验依据 1 INSPIRE 标识 10.1007/BF02084158:The thermodynamics of comp
#麦克斯韦妖 #朗道尔 #信息熵
黑洞的“贝肯斯坦–霍金熵”意味着什么?
What does Bekenstein-Hawking black-hole entropy mean?
黑洞的熵正比于视界面积而非体积,暗示信息可能“写”在表面上;这与热力学熵呼应,也引发“信息悖论”——掉进去的信息去哪了。
Black-hole entropy scales with horizon area, not volume, hinting information lives on a surface; it mirrors thermodynamic entropy and sparks the information paradox of what falls in.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注:著录含书名,但缺版次 / 出版社 / 年份中的一部分,需编辑补全后才能做独立比对。
Bekenstein,《黑洞与熵》,Physical Review D 7 (1973)
Bekenstein, 'Black Holes and Entropy', Physical Review D 7 (1973)
#黑洞熵 #视界 #信息悖论
信息会被“销毁”吗,还是只是扩散了?
Is information destroyed or just spread out?
朗道尔原理说:每擦除 1 比特确定信息,至少向环境释放 kT·ln2 的热量。信息并非消失,而是变成更分散、更难回收的热无序。
Landauer's principle says erasing one bit costs at least kT·ln2 of heat. Information is not destroyed but spread into harder-to-recover thermal disorder.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-02
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Landauer,《计算过程中的不可逆性与热产生》,IBM Journal of Research and Development 5 (1961)
Landauer, 'Irreversibility and Heat Generation in the Computing Process', IBM Journal of Research and Development 5 (1961)
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.1147/rd.53.0183:Irreversibility and Heat
#朗道尔原理 #信息 #熵
“熵”是不是就是混乱?
Is entropy just messiness?
粗略说,熵衡量一个系统有多少种排布方式;方式越多越“乱”,热量也越难变回有用的功。
Roughly, entropy counts how many ways a system can be arranged; more ways means more disorder and less usable energy.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
秦允豪,《热学》,高等教育出版社,2011
Qin Yunhao, Thermal Physics, Higher Education Press, 2011
#熵 #无序 #热力学