Wednesday, May 12, 2010

Maxwell's demon

Mark G Raizen recently gave a talk about techniques for trapping and cooling atoms. In this way, he actually implemented Maxwell's demon in practice!

http://www.sciencemag.org/cgi/content/abstract/324/5933/1403

Yes, this demon exists and does not violate the second law of thermodynamics because information is a thermodynamic variable with an essential role.

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