论文标题
腔内的超电晶格玻色子的非平衡动力学
Non-equilibrium dynamics of ultracold lattice bosons inside a cavity
论文作者
论文摘要
我们研究了与腔介导相互作用的玻体晶格气体的电荷密度波（CDW）和超酚（SS）相之间连续相变的非平衡淬灭动力学。当更改哈密顿量作为时间的函数中的跳跃幅度时，我们研究了相关长度和涡流密度相对于淬火时间的缩放行为，并发现淬火速率的阈值分开了两个不同的缩放机制。当缓慢改变该系统以下时，我们发现了kibble-Zurek机构（KZM）预测的幂律缩放。在考虑到高于该阈值的快速淬火时，与KZM预测的偏差发生在缺陷密度的饱和度中。我们进一步表明，可以通过比较放松时间和淬火率来理解不同动态过程中这种不同的缩放行为。
We study the non-equilibrium quench dynamics crossing a continuous phase transition between the charge density wave (CDW) and supersolid (SS) phases of a bosonic lattice gas with cavity-mediated interactions. When changing the hopping amplitude in the Hamiltonian as a function of time, we investigate the scaling behavior of the correlation length and vortex density with respect to the quench time and find that there is a threshold of the quench rate separating two distinct scaling regimes. When slowly varying the system below that threshold, we find a power-law scaling as predicted by the Kibble-Zurek mechanism (KZM). While considering fast quench above that threshold, a deviation from the KZM prediction occurs, manifested by a saturation of the defect density. We further show that such distinct scaling behaviors during different dynamic procedures can be understood through comparing the relaxation time and the quench rate.
