
%0 Journal Article
%A Milburn, G. J. 
%T An Atom-optical Maxwell Demon
%J Australian Journal of Physics
%D 1998/02/10
%V 51
%N 1
%P 1-8
%K 
%R https://doi.org/10.1071/P97021
%U https://www.publish.csiro.au/paper/P97021 
%X 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. 
