Berry phase, entanglement entropy, and algebraic properties of ground states of BCS and BEC superfluids

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• 作者：Hao Guo^a ; Yan He^b ; Chih-Chun Chien^c ; ^{cchien5@ucmerced.edu}
• 关键词：BCS theory ; Superfluids ; Bose&ndash ; Einstein condensation ; Entanglement entropy ; Berry phase ; q-deformed algebra
• 刊名：Physics Letters A
• 出版年：2017
• 出版时间：30 January 2017
• 年：2017
• 卷：381
• 期：4
• 页码：351-361
• 全文大小：445 K
• 卷排序：381

文摘

BCS and BEC ground states are generalized coherent squeeze states. Presenting Berry phase and effective magnetic monopole of superfluid ground states. Deriving entanglement entropy of superfluid ground states. Comparing the BCS and fixed particle-number ground states of fermionic superfluids. Identifying q-deformed algebras for BCS and BEC ground states.