Translation-invariant quasi-free states for fermionic systems and the BCS approximation
By Gerhard Bräunlich, Christian Hainzl and Robert Seiringer
Publisher: World Scientific Pub Co Pte Lt
Year: 2014
DOI identifier: 10.1142/s0129055x14500123
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http://arxiv.org/pdf/1305.5135 (external
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