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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.
 
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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[[Category:Physics]]
 
[[Category:Physics]]
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[[Category:Thermodynamics]]
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[[Category:Second law of thermodynamics]]
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