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Fluctuation theorem (view source)

Revision as of 00:55, February 3, 2007

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The fluctuation theorem addresses the probability under [[statistical mechanics]] that the [[entropy]] of a system not at thermodynamic equilibrium (maximum [[entropy]]) will increase or decrease over a period of time.

The [[second law of thermodynamics]] predicts that such entropy should increase until equilibrium. But under the theory of statistical mechanics there would always be a nonzero probability that the entropy of an isolated system will spontaneously decrease. The fluctuation theorem precisely quantifies such probability under the theory of statistical mechanics.
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