论文标题
与移动屏障的自旋轨道耦合的玻璃纤维耦合凝结物中的Roton和声子激发的检测
Detection of roton and phonon excitations in a spin-orbit coupled Bose-Einstein condensate with a moving barrier
论文作者
论文摘要
我们建议通过用弱势屏障扰动原子云来检测与拉曼诱导的自旋轨道耦合的二维玻色凝结物中的声子和Roton激发。可以通过在适当的参数方向上移动屏障来观察两种激发模式。声子激发通过孤立波的出现来识别，而Roton激发会导致独特的空间密度调制。我们表明，该方法也可以用于确定超氟的各向异性临界速度。
We propose to detect phonon and roton excitations in a two-dimensional Bose-Einstein condensate with Raman-induced spin-orbit coupling by perturbing the atomic cloud with a weak barrier. The two excitation modes can be observed by moving the barrier along different directions in appropriate parameter regimes. Phonon excitations are identified by the appearance of solitary waves, while roton excitations lead to distinctive spatial density modulations. We show that this method can also be used to determine the anisotropic critical velocities of superfluid.
