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arXiv 1303.2628cond-mat.quant-gas
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Rashba耦合费米气体的非伽利略响应

Non-Galilean response of Rashba coupled Fermi gases

Daniel Maldonado-Mundo, Lianyi He, Patrik Ohberg, Manuel Valiente

摘要:

研究了动量反冲对Rashba自旋轨道耦合下二维费米气体基态的影响。虽然总动量是一个运动常数,但气体并不遵守伽利略相对论的规则。在非相互作用气体上留下一个小的总速度后,我们发现费米海以一种非平凡的方式变形。我们还考虑了一个弱排斥费米气体,并发现,从它的Hartree位移,总的基态的系统可能会变成一个变形的,有限的动量基态的排斥增加超过一个临界值,而不需要任何外部塞曼场。我们还讨论了这些影响可能的实验签名。

英文摘要:

We consider the effect of a momentum kick on the ground state of a non-interacting two-dimensional Fermi gas subject to Rashba spin-orbit coupling. Although the total momentum is a constant of motion, the gas does not obey the rules of Galilean relativity. Upon imprinting a small overall velocity to the non-interacting gas, we find that the Fermi sea is deformed in a non-trivial way. We also consider a weakly repulsive Fermi gas, and find, from its Hartree shift, that the total ground state of the system may change into a deformed, finite momentum ground state as the repulsion is increased beyond a critical value, without the need of any external Zeeman fields. We also discuss possible experimental signatures of these effects.

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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