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自旋轨道耦合玻色-爱因斯坦凝聚体在尖端势垒散射中的Klein隧穿
Klein tunneling in spin-orbit coupled Bose-Einstein condensate scattered by cusp barrier
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摘要: 本文对自旋-轨道耦合的玻色-爱因斯坦凝聚体经过尖端势垒散射的过程进行了数值模拟，发现散射过程中存在Klein隧穿现象。相较于高斯势垒，尖端势垒散射的Klein阻塞及Klein隧穿区域会向较高势垒方向移动。在Klein隧穿区域，透射系数随势垒高度而振荡下降，且振幅随着势垒增高而逐渐减小。最后，分别讨论了原子相互作用对经典透射区域、Klein阻塞区域以及Klein隧穿区域散射过程的影响。Abstract: The scattering process when spin-orbit coupled Bose-Einstein condensate gets through cusp barrier is numerically simulated by adopting time-split spectrum method;the Klein tunneling phenomena exist in the scattering process. The regions of Klein block and Klein tunneling will appear at higher barrier height as compared to the scattering process on getting through Gaussian barrier. In the Klein tunneling region, the transmission coeffcient oscillates with the barrier height, and the oscillation amplitude decreases with increasing barrier height. Besides, the effect of non-linear atomic interaction has been discussed for different barrier heights as well.
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