论文标题
激光驱动的偶极bose-Einstein冷凝物的晶相
Crystalline Phases of Laser-Driven Dipolar Bose-Einstein Condensates
论文作者
论文摘要
尽管结晶本质上是一种普遍存在的现象，但晶体形成和融化仍然令人着迷，尚待解决几个尚待解决的问题。在这项工作中，我们研究了由于远距离磁和有效无限范围的光诱导的相互作用之间的相互作用，激光驱动的偶极bose-enstein冷凝物的新兴结晶。这两种相互作用之间的竞争导致一个集体激发光谱与两个Roton minima引入了两个不同的长度尺度，可以在其中出现晶体顺序。除了由于其中一个Rotons的软化而形成具有简单周期性模式的常规晶体外，我们发现两个旋转膜也可以同时软化，从而形成了异国情调，复杂的周期性或大型密度模式。我们还展示了动态态制备方案，以实现实验相关和可行的参数状态的所有发现的结晶状态
Although crystallization is a ubiquitous phenomenon in nature, crystal formation and melting still remain fascinating processes with several open questions yet to be addressed. In this work, we study the emergent crystallization of a laser-driven dipolar Bose-Einstein condensate due to the interplay between long-range magnetic and effectively infinite-range light-induced interactions. The competition between these two interactions results in a collective excitation spectrum with two roton minima that introduce two different length scales at which crystalline order can emerge. In addition to the formation of regular crystals with simple periodic patterns due to the softening of one of the rotons, we find that both rotons can also soften simultaneously, resulting in the formation of exotic, complex periodic or aperiodic density patterns. We also demonstrate dynamic state-preparation schemes for achieving all the found crystalline ground states for experimentally relevant and feasible parameter regimes
