论文标题
在捕获的超速玻色气中的kibble-zurek动力学
Kibble-Zurek Dynamics in a Trapped Ultracold Bose Gas
论文作者
论文摘要
在最近在各向异性谐波陷阱中进行的实验，研究了以不同的可控速率淬灭的不均匀超电原子气体的动力演化。我们的发现基于随机（预测的）GROSS-PITAEVSKII方程，在早期与均匀的kibble-Zurek机制的预测保持一致。这是通过根据对淬火系统感受到的距离距离的适当表征的适当表征来证明了不同淬灭速率的密度，光谱函数和相关长度的早期动力学演变的证明。还通过查看密度波前演化的行为和相应的相排序动力学的行为来研究随后的长期演化，超出已确定的动态临界区域。
The dynamical evolution of an inhomogeneous ultracold atomic gas quenched at different controllable rates through the Bose-Einstein condensation phase transition is studied numerically in the premise of a recent experiment in an anisotropic harmonic trap. Our findings based on the stochastic (projected) Gross-Pitaevskii equation are shown to be consistent at early times with the predictions of the homogeneous Kibble-Zurek mechanism. This is demonstrated by collapsing the early dynamical evolution of densities, spectral functions and correlation lengths for different quench rates, based on an appropriate characterization of the distance to criticality felt by the quenched system. The subsequent long-time evolution, beyond the identified dynamical critical region, is also investigated by looking at the behaviour of the density wavefront evolution and the corresponding phase ordering dynamics.
