论文标题
玻色子凝结物中的离子极化子
Ionic polaron in a Bose-Einstein condensate
论文作者
论文摘要
在多体量子系统中存在强相互作用会导致各种外来效应。在这里，我们表明，即使在相对简单的设置中，该设置由弱相互作用的骨介质组成，长度尺度的竞争也会产生高度相关的介质状态。使用量子蒙特卡洛模拟，我们与中性量子杂质相比，我们揭示了其极化性质的巨大不同。此外，我们确定了在弱原子相互作用的极限和多体结合的状态下，与数百种原子组成的消失的准原子相互作用的限制，在常规扰动治疗之间进行了过渡。为了分析相应状态的结构，我们检查了均显示出非平凡特性的原子 - 原子和原子相关函数。我们的发现与使用最近达到超级元素的混合原子-ON-ION设置的实验直接相关。
The presence of strong interactions in a many-body quantum system can lead to a variety of exotic effects. Here we show that even in a comparatively simple setup consisting of a charged impurity in a weakly interacting bosonic medium the competition of length scales gives rise to a highly correlated mesoscopic state. Using quantum Monte Carlo simulations, we unravel its vastly different polaronic properties compared to neutral quantum impurities. Moreover, we identify a transition between the regime amenable to conventional perturbative treatment in the limit of weak atom-ion interactions and a many-body bound state with vanishing quasi-particle residue composed of hundreds of atoms. In order to analyze the structure of the corresponding states we examine the atom-ion and atom-atom correlation functions which both show nontrivial properties. Our findings are directly relevant to experiments using hybrid atom-ion setups that have recently attained the ultracold regime.
