Exotic superfluidity in spin-orbit coupled Bose-Einstein condensates

Exotic superfluidity in spin-orbit coupled Bose-Einstein condensates
复制标题

自旋轨道耦合玻色-爱因斯坦凝聚中的奇异超流性

DOI:
10.1209/0295-5075/100/50003
复制
发表时间:
2011-09
期刊:
Epl
影响因子:
1.8
通讯作者:
Wu, Biao
Wu, Biao
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Zhu, Qizhong;Zhang, Chuanwei;Wu, Biao

文献摘要

参考文献

被引文献

相似文献

通过计算玻色-爱因斯坦凝聚体(BEC)的Bogoliubov激发态,研究了自旋-轨道耦合BEC的超流性,发现BEC的Bogoliubov激发态有两个分支:一个是长波的类声子无隙激发态,另一个是典型的带隙激发态.这些激发意味着超流性具有两个新的特征:i)由于伽利略不变性的缺失,人们不再能独立于参考系定义超流性的临界速度; ii)超流性不仅取决于BEC的速度是否超过临界值,而且还取决于交叉螺旋度,交叉螺旋度被定义为BEC的自旋和动能的叉积的方向。
We study the superfluidity of a spin-orbit coupled Bose-Einstein condensate (BEC) by computing its Bogoliubov excitations, which are found to have two branches: one is gapless and phonon-like at long wavelength; the other is typically gapped. These excitations imply superfluidity that has two new features: i) due to the absence of the Galilean invariance, one can no longer define the critical velocity of superfluidity independent of the reference frame; ii) the superfluidity depends not only on whether the speed of the BEC exceeds a critical value, but also on cross-helicity that is defined as the direction of the cross-product of the spin and the kinetic momentum of the BEC.
DOI: 10.1088/0954-3899/40/5/053101
发表时间: 2013-03
期刊: arXiv: Nuclear Theory
影响因子: --
作者:
N. Zinner;A. Jensen
通讯作者: N. Zinner;A. Jensen
DOI: 10.1103/physreva.84.063638
发表时间: 2011-12
期刊: Physical Review A
影响因子: 2.9
作者:
A. Yulin;Y. Bludov;V. Konotop;V. Kuzmiak;M. Salerno
通讯作者: A. Yulin;Y. Bludov;V. Konotop;V. Kuzmiak;M. Salerno
DOI: 10.5772/intechopen.87908
发表时间: 1949
期刊: --
影响因子: --
作者:
Schiff Bandhyopadhyay
通讯作者: Schiff Bandhyopadhyay
DOI: 10.1142/9789813228658_0003
发表时间: 1966
期刊: --
影响因子: --
作者:
K. Gottfried
通讯作者: K. Gottfried
DOI: 10.1119/1.17836
发表时间: 1993-12
期刊: --
影响因子: --
作者:
S. Mcmurry;A. Someren
通讯作者: S. Mcmurry;A. Someren