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How creating one additional well can generate Bose-Einstein condensation
Communications Physics ( IF 5.5 ) Pub Date : 2021-02-17 , DOI: 10.1038/s42005-021-00533-3
Mihály Máté , Örs Legeza , Rolf Schilling , Mason Yousif , Christian Schilling

The realization of Bose-Einstein condensation in ultracold trapped gases has led to a revival of interest in this 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.



中文翻译:

如何增产一口井会如何产生玻色-爱因斯坦凝聚

Bose-Einstein凝聚在超冷捕集气体中的实现导致人们对这种引人入胜的量子现象产生了兴趣。这一实验成果需要极低的温度和足够弱的相互作用。特别是在减小的空间尺寸中,即使是最小的相互作用也立即导致偏离准冷凝。我们提出了一个强烈相互作用的玻色子的系统,该系统通过展现许多有趣的相关特征来克服这些障碍:(i)仅调节单个控制参数就可以驱动从准凝聚到完全凝聚的转变,(ii)破坏性影响互动性的提高被相应的移动性所补偿,(iii)拓扑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)打开了基态间隙,这使冷凝对热噪声具有鲁棒性。值得注意的是,尽管系统具有非扰动特性,但所有这些特征都可以通过解析和精确的数值方法得出。

更新日期:2021-02-17
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