自旋轨道角动量耦合的超流费米气体  

Superfluid Fermi gas with spin-orbit angular momentum coupling

作　　者：徐子威 杨明月 纪安春[1] 孙青 XU Ziwei;YANG Mingyue;JI Anchun;SUN Qing(Department of Physics,Capital Normal University,Beijing 100048)

机构地区：[1]首都师范大学物理系,北京100048

出　　处：《首都师范大学学报（自然科学版）》2024年第2期65-73,共9页Journal of Capital Normal University：Natural Science Edition

摘　　要：近年来,自旋轨道耦合的原子气体研究取得了许多重要的进展,其中一种新近实现的新类型自旋轨道耦合-自旋轨道角动量耦合由于其独特性质吸引了人们的兴趣。本文以费米气体为例,介绍自旋轨道角动量耦合的实现和特点,以及对单粒子谱特别是对费米超流的重要影响。结合平均场解析方法和数值模拟,分析了自旋轨道角动量耦合诱导的有限角动量配对和由此导致的不同类型的超流涡旋基态,并进一步讨论了相关的进展和未来可能的发展方向。In recent years,there have been significant advances in the study of atomic gases with spinorbit coupling.Among these,a newly implemented type of spin-orbit coupling,known as spin-orbit angular momentum coupling,has drawn considerable interest due to its unique properties.In this article,we take fermionic gases as an example to introduce the implementation and characteristics of spin-orbit angular momentum coupling,emphasizing its important influence on single-particle spectra and particularly on fermionic superfluidity.By combining mean-field analytical methods and numerical simulations,we analyze the finite angular momentum pairing induced by spin-orbit angular momentum coupling and the resulting ground states of different types of superfluid vortices.Furthermore,we discuss relevant progress and potential future directions.

关 键 词：费米气体 自旋轨道角动量耦合 费米超流 涡旋态 

分 类 号：O469[理学—凝聚态物理]