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arXiv 1901.02595cond-mat.quant-gasphysics.atom-phquant-ph
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自旋-轨道-角动量耦合玻色凝聚体中的角条纹相

Angular Stripe Phase in Spin-Orbital-Angular-Momentum Coupled Bose Condensates

Xiao-Long Chen, Shi-Guo Peng, Peng Zou, Xia-Ji Liu, Hui Hu

AI总结:

提出在自旋-轨道-角动量耦合的类饼状自旋-1/2玻色气体中实现具有超固态性质的角条纹相,预测了包含涡旋-反涡旋对相、半斯格明子相和角条纹相的基态相图,并分析了不同相的集体激发及相变不稳定性,可在$^{87}$Rb和$^{41}$K冷原子实验中检验。

摘要:

我们提出,一种具有超固态类似性质的新型超流体——角条纹相——可以在具有自旋-轨道-角动量耦合的类饼状自旋-1/2玻色气体中实现。我们预测了丰富的基态相图,包括涡旋-反涡旋对相、半斯格明子相以及两种不同的角条纹相。条纹相的特征是具有显著对比度的调制角密度-密度关联,并且可占据相对较大的参数空间。低能集体激发,如偶极和呼吸模式,在不同相中表现出截然不同的行为。在相变附近的集体模式的能量和动力学不稳定性中也清楚地表明了这种新型条纹相的存在。我们对角条纹相的预测可以在当前使用$^{87}$Rb和$^{41}$K的冷原子实验中容易地进行检验。

英文摘要:

We propose that novel superfluid with supersolid-like properties - angular stripe phase - can be realized in a pancake-like spin-1/2 Bose gas with spin-orbital-angular-momentum coupling. We predict a rich ground-state phase diagram, including the vortex-antivortex pair phase, half-skyrmion phase, and two different angular stripe phases. The stripe phases feature modulated angular density-density correlation with sizable contrast and can occupy a relatively large parameter space. The low-lying collective excitations, such as the dipole and breathing modes, show distinct behaviors in different phases. The existence of the novel stripe phase is also clearly indicated in the energetic and dynamic instabilities of collective modes near phase transitions. Our predictions of the angular stripe phase could be readily examined in current cold-atom experiments with $^{87}$Rb and $^{41}$K.

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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