Quantum droplets with particle imbalance in one-dimensional optical lattices
Quantum droplets with particle imbalance in one-dimensional optical lattices
复制标题
一维光学晶格中具有粒子不平衡的量子液滴
DOI：
10.21468/scipostphys.16.3.074
复制
发表时间：
2023
期刊：
影响因子：
5.5
通讯作者：
B. Juli'a
中科院分区：
文献类型：
--
作者：
Jofre Vallès;I. Morera;G. Astrakharchik;B. Juli'a
我们研究了零温度下包含二元玻色子混合物的一维光学晶格中粒子不平衡量子液滴的形成。为了从少体和多体角度理解不平衡的影响，我们采用密度矩阵重正化群（DMRG）模拟并外推至热力学极限。与粒子平衡的情况相反，并非所有玻色子都是配对的，导致束缚态和单个原子之间的相互作用，从而导致有趣的现象。量子液滴设法维持小颗粒不平衡，从而产生有效的磁化。然而，随着不平衡性进一步增加，最终会越过临界点，液滴开始排出多余的颗粒，而块体中的磁化强度保持恒定。值得注意的是，量子液滴顶部的不成对粒子有效地形成了超级唐克斯-吉拉多（硬棒）气体。排出点与超级唐克斯-吉拉多气体的尺寸与液滴尺寸相匹配的临界密度一致。
We study the formation of particle-imbalanced quantum droplets in a one-dimensional optical lattice containing a binary bosonic mixture at zero temperature. To understand the effects of the imbalance from both the few- and many-body perspectives, we employ density matrix renormalization group (DMRG) simulations and perform the extrapolation to the thermodynamic limit. In contrast to the particle-balanced case, not all bosons are paired, resulting in an interplay between bound states and individual atoms that leads to intriguing phenomena. Quantum droplets manage to sustain a small particle imbalance, resulting in an effective magnetization. However, as the imbalance is further increased, a critical point is eventually crossed, and the droplets start to expel the excess particles while the magnetization in the bulk remains constant. Remarkably, the unpaired particles on top of the quantum droplet effectively form a super Tonks-Girardeau (hard-rod) gas. The expulsion point coincides with the critical density at which the size of the super Tonks-Girardeau gas matches the size of the droplet.
影响因子：
8.6
作者：
Ferrier-Barbut, Igor;Kadau, Holger;Pfau, Tilman
通讯作者：
Pfau, Tilman
影响因子：
64.8
作者：
Schmitt, Matthias;Wenzel, Matthias;Pfau, Tilman
通讯作者：
Pfau, Tilman