Oscillating Casimir potential between two impurities in a spin-orbit-coupled Bose-Einstein condensate
Oscillating Casimir potential between two impurities in a spin-orbit-coupled Bose-Einstein condensate
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自旋轨道耦合玻色-爱因斯坦凝聚中两种杂质之间的振荡卡西米尔势
DOI：
10.1103/physreva.96.043617
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发表时间：
2017
影响因子：
2.9
通讯作者：
Sun Qing
中科院分区：
文献类型：
--
作者：
He Pei-Song;Ji An-Chun;Sun Qing
我们研究了浸入平面波阶自旋轨道耦合玻色爱因斯坦凝聚 (BEC) 中的两种杂质之间的卡西米尔势。我们发现，通过交换虚拟声子/激发，可以在杂质之间感应出具有正负部分的显着各向异性振荡势，振荡周期取决于自旋轨道耦合强度。因此，这将不可避免地导致非中心卡西米尔力，可以通过改变自旋轨道耦合的强度来调整该力。这些结果针对具有一维拉曼诱导和二维 Rashba 型 SOC 的 BEC 得到了阐明。
We study the Casimir potential between two impurities immersed in a spin-orbit coupled BoseEinstein condensate (BEC) with plane-wave order. We find that, by exchanging the virtual phonons/excitations, a remarkable anisotropic oscillating potential with both positive and negative parts can be induced between the impurities, with the period of the oscillation depending on the spin-orbit coupling strength. As a consequence, this would inevitably lead to a non-central Casimir force, which can be tuned by varying the strength of spin-orbit coupling . These results are elucidated for BECs with one-dimensional Raman-induced and two-dimensional Rashba-type SOC.