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arXiv 1003.4735cond-mat.str-el
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BEC-BCS交叉现象中的拓扑量子相变

Topological quantum phase transition in the BEC-BCS crossover phenomena

Mitsuhiro Arikawa, Isao Maruyama, Yasuhiro Hatsugai

摘要:

在具有吸引相互作用的手征对称费米子系统中,拓扑地描述了玻色-爱因斯坦凝聚(BEC)态与BCS超导态之间的交叉。利用局域Z_2 Berry相,我们发现了BEC和BCS相之间的量子相变,而不伴随体能隙的闭合。

英文摘要:

A crossover between the Bose Einstein condensation (BEC) and BCS superconducting state is described topologically in the chiral symmetric fermion system with attractive interaction. Using a local Z_2 Berry phase, we found a quantum phase transition between the BEC and BCS phases without accompanying the bulk gap closing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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