Two-fluid theory for a superfluid system with anisotropic effective masses
Two-fluid theory for a superfluid system with anisotropic effective masses
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具有各向异性有效质量的超流体系统的双流体理论
DOI:
10.1103/physreva.99.043622
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发表时间:
2018-11
影响因子:
2.9
通讯作者:
Wu-Ming Liu
中科院分区:
文献类型:
--
作者:
Yi-Cai Zhang;Chao-Fei Liu;Bao Xu;Gang Chen;Wu-Ming Liu
In this work, we generalize the two-fluid theory to a superfluid system with anisotropic effective masses along different principal axis directions. As a specific example, such a theory can be applied to spin-orbit coupled Bose-Einstein condensate (BEC) at low temperature. The normal density from phonon excitations and the second sound velocity are obtained analytically. Near the phase transition from the plane wave to zero-momentum phases, due to the effective mass divergence, the normal density from phonon excitation increases greatly, while the second sound velocity is suppressed significantly. With quantum hydrodynamic formalism, we give unified derivations for suppressed superfluid density and Josephson relation. At last, the momentum distribution function and fluctuation of phase for the long wave length are also discussed.
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影响因子:
1.8
作者:
Zhu, Qizhong;Zhang, Chuanwei;Wu, Biao
通讯作者:
Wu, Biao
影响因子:
4.6
作者:
Yan-Hua Hou;Zhenhua Yu
通讯作者:
Zhenhua Yu
DOI:
10.1201/9780429502897
发表时间:
1965
期刊:
--
影响因子:
--
作者:
I. Khalatnikov
通讯作者:
I. Khalatnikov
DOI:
10.1088/0953-4075/46/13/134007
发表时间:
2012-12
期刊:
Journal of Physics B: Atomic, Molecular and Optical Physics
影响因子:
--
作者:
Wei-mou Zheng;Zeng-Qiang Yu;Xiaoling Cui;H. Zhai
通讯作者:
Wei-mou Zheng;Zeng-Qiang Yu;Xiaoling Cui;H. Zhai
影响因子:
3.3
作者:
Hui Hu;P. Dyke;C. Vale;Xiaji Liu
通讯作者:
Hui Hu;P. Dyke;C. Vale;Xiaji Liu