Slaying physics demons.
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| Title: | Slaying physics demons. |
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| Authors: | Falk, Dan (AUTHOR) |
| Source: | New Scientist. 12/13/2025, Vol. 268 Issue 3573/3574, p46-49. 4p. 3 Cartoon or Caricatures. |
| Subjects: | Thought experiments, Entropy, Quantum mechanics, Determinism (Philosophy), Statistical mechanics, Intellect, Thermodynamics, Maxwell, James Clerk, 1831-1879 |
| Abstract: | The article explores three enduring thought experiments in physics, collectively referred to as "demons," which challenge fundamental concepts in the field. The first, Laplace's demon, posits an entity with perfect knowledge of all particles, suggesting a deterministic universe, but is undermined by the principles of relativity and quantum mechanics. The second, Loschmidt's demon, raises questions about entropy and time's directionality, ultimately revealing that while microscopic reversibility exists, macroscopic disorder prevails due to probabilistic laws. Lastly, Maxwell's demon illustrates the interplay between information and energy, suggesting that managing information can lead to work without violating thermodynamic laws. These thought experiments serve as valuable tools for physicists to refine their understanding of reality. [Extracted from the article] |
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| Database: | Engineering Source |
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| Abstract: | The article explores three enduring thought experiments in physics, collectively referred to as "demons," which challenge fundamental concepts in the field. The first, Laplace's demon, posits an entity with perfect knowledge of all particles, suggesting a deterministic universe, but is undermined by the principles of relativity and quantum mechanics. The second, Loschmidt's demon, raises questions about entropy and time's directionality, ultimately revealing that while microscopic reversibility exists, macroscopic disorder prevails due to probabilistic laws. Lastly, Maxwell's demon illustrates the interplay between information and energy, suggesting that managing information can lead to work without violating thermodynamic laws. These thought experiments serve as valuable tools for physicists to refine their understanding of reality. [Extracted from the article] |
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| ISSN: | 02624079 |
| DOI: | 10.1016/s0262-4079(25)02033-0 |
