Flaw of Jarzynski's equality when applied to systems with several degrees of freedom

Details Flaw of Jarzynski's equality when applied to systems with several degrees of freedom Flaw of Jarzynski's equality when applied to systems with several degrees of freedom

2005-08-30

arxiv.org/abs/cond-mat/0508721v1

Physics

Condensed Matter

Statistical Mechanics

2 pages, no figure

Scientific paper

Simple example: During the sudden expansion of an isolated ideal gas from a
small volume V_0 into a larger one V_1, the entropy changes by Delta S= N
ln(V_1/V_0)=-beta Delta F>0 but no work W is produced nor absorbed.
Consequently, Jarzynski's identity = exp(-beta Delta F) is wrong.

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