Exotic Vortex States with Discrete Rotational Symmetry in Atomic Fermi Gases with Spin-Orbital--Angular-Momentum Coupling
Exotic Vortex States with Discrete Rotational Symmetry in Atomic Fermi Gases with Spin-Orbital--Angular-Momentum Coupling
复制标题
具有自旋轨道-角动量耦合的原子费米气体中具有离散旋转对称性的奇异涡旋态
DOI：
10.1103/physrevlett.126.193401
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发表时间：
2021
影响因子：
8.6
通讯作者：
Li Jian
中科院分区：
文献类型：
--
作者：
Wang Liang-Liang;Ji An-Chun;Sun Qing;Li Jian
研究了自旋轨道角动量耦合（SOAMC）下双组分费米气体的超流性。由于SOAMC，双光子失谐和原子-原子相互作用的复杂相互作用，一个家庭的涡旋基态出现在一个广泛的参数制度的相图，在通常的情况下，通常需要一个外部旋转或磁场。更引人注目的是，一个前所未有的涡旋状态，打破了连续的旋转对称性，一个离散的自发，预计会发生。基本的物理阐明和验证的数值模拟。所预言的涡旋态的密度分布是独特的，这使得在实验中可以直接观察到。
We investigate the superfluidity of a two-component Fermi gas with spin-orbital-angular-momentum coupling (SOAMC). Because of the intricate interplay of SOAMC, two-photon detuning and atom-atom interaction, a family of vortex ground states emerges in a broad parameter regime of the phase diagram, in contrast to the usual case where an external rotation or magnetic field is generally required. More strikingly, an unprecedented vortex state, which breaks the continuous rotational symmetry to a discrete one spontaneously, is predicted to occur. The underlying physics are elucidated and verified by numerical simulations. The unique density distributions of the predicted vortex states enable a direct observation in experiment.