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arXiv 2002.09997cond-mat.quant-gasquant-ph
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如何创造一个额外的井可以产生玻色-爱因斯坦凝聚

How creating one additional well can generate Bose-Einstein condensation

Mihály Máté, Örs Legeza, Rolf Schilling, Mason Yousif, Christian Schilling

摘要:

超冷气体中玻色-爱因斯坦凝聚的实现,使人们对这一迷人的量子现象重新产生了兴趣。这一实验成就需要极低的温度和足够弱的弱相互作用。特别是在减少空间维数,即使是一个无穷小的相互作用立即导致偏离准凝聚。我们提出了一个强相互作用玻色子系统,它通过展示一些有趣的相关特征来克服这些障碍:(i)仅调整单个控制参数就能驱动从准凝聚到完全凝聚的转变,(ii)强相互作用的破坏性影响被各自增加的迁移率补偿,(iii)拓扑结构起着至关重要的作用,因为模拟了从一维到“无限”维的交叉,(iv)基态间隙打开,这使得冷凝对热噪声具有鲁棒性。值得注意的是,所有这些功能可以通过解析和精确的数值方法,尽管系统的非微扰特性。

英文摘要:

The realization of Bose-Einstein condensation in ultracold trapped gases has led to a revival of interest in that fascinating quantum phenomenon. This experimental achievement necessitated both extremely low temperatures and sufficiently weak interactions. Particularly in reduced spatial dimensionality even an infinitesimal interaction immediately leads to a departure to quasi-condensation. We propose a system of strongly interacting bosons which overcomes those obstacles by exhibiting a number of intriguing related features: (i) The tuning of just a single control parameter drives a transition from quasi-condensation to complete condensation, (ii) the destructive influence of strong interactions is compensated by the respective increased mobility, (iii) topology plays a crucial role since a crossover from one- to `infinite'-dimensionality is simulated, (iv) a ground state gap opens which makes the condensation robust to thermal noise. Remarkably, all these features can be derived by analytical and exact numerical means despite the non-perturbative character of the system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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