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An Atom-optical Maxwell Demon
1998
Australian journal of physics (Print)
The separation, by an optical standing wave, of a beam of two-level atoms prepared in a thermal mixture of ground and excited states, is considered as an example of a Maxwell demon. By including the momentum exchanged with the cavity, it is shown how no violation of the second law is possible. A classical and quantum analysis is given which illustrates this principle in some detail.
doi:10.1071/p97021
fatcat:yq2lqzhykzam3infpdx3sft6jm