标题： 一维光子超晶格中超冷玻色原子的准绝热动力学 显示英文标题

标题： Quasiadiabatic dynamics of ultracold bosonic atoms in a one-dimensional optical superlattice

摘要： 我们研究了超冷玻色原子在一维光子超晶格中的准绝热动力学。 聚焦于超晶格势能随时间的缓慢线性变化，系统从传统的莫特绝缘体相被驱动到由超晶格诱导的莫特绝缘体相，在此过程中穿过一个无能隙的临界超流区域。 由于存在无能隙区域，根据淬火速度的不同会出现一定数量的缺陷。 我们的发现表明，对于淬火速率的中间值，缺陷表现出类似于基布尔-祖雷克机制的幂律依赖关系。 对于我们考虑的淬火动力学的时间范围，缺陷的标度非平凡地依赖于超流区域的宽度。 显示英文摘要

摘要： We study the quasiadiabatic dynamics of a one-dimensional system of ultracold bosonic atoms loaded in an optical superlattice. Focusing on a slow linear variation in time of the superlattice potential, the system is driven from a conventional Mott insulator phase to a superlattice-induced Mott insulator, crossing in between a gapless critical superfluid region. Due to the presence of a gapless region, a number of defects depending on the velocity of the quench appear. Our findings suggest a power-law dependence similar to the Kibble-Zurek mechanism for intermediate values of the quench rate. For the temporal ranges of the quench dynamics that we considered, the scaling of defects depends nontrivially on the width of the superfluid region.