Ehrenfest's Theorem Revisited

H. Arodz

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arXiv · 1907.02354

Ehrenfest's Theorem Revisited

H. Arodz

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Abstract

Historically, Ehrenfest's theorem (1927) is the first one which shows that classical physics can emerge from quantum physics as a kind of approximation. We recall the theorem in its original form. Next, we highlight its generalizations to the relativistic Dirac particle, and to a particle with spin and izospin. We argue that apparent classicality of the macroscopic world can probably be explained within the framework of standard quantum mechanics.

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H. Arodz. 2019-07-04. Ehrenfest's Theorem Revisited. https://arxiv.org/abs/1907.02354

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