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arXiv 2302.08288cond-mat.quant-gascond-mat.other
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多组分玻色混合物的基态性质:Gutzwiller平均场研究

Ground state properties of a multi-component bosonic mixture: a Gutzwiller mean-field study

Chenrong Liu, Po Chen, Linli He, Fangfang Xu

AI总结:

本文用单格点Gutzwiller方法研究光学晶格中交换对称多组分玻色混合物的基态与种间纠缠,发现n-1个SCF瓣分隔相邻nMI瓣,并推导出SCF相纠缠熵的精确表达式,证明退混合临界点与组分数n无关。

摘要:

利用单格点Gutzwiller方法,我们从理论上研究了光学晶格中交换对称的多组分(两组分和三组分)玻色混合物的基态和种间纠缠性质,并将结果推广到n组分(n=2,3,4,...)系统。我们计算了平均场相图、种间纠缠熵和基态谱分解。观察到三种相,即n组分超流态(nSF)、n组分Mott绝缘态(nMI)和超对流态(SCF)。有趣的是,我们发现相图中存在n-1个SCF瓣,将每两个相邻的nMI瓣分开。更重要的是,我们推导出了SCF相种间纠缠熵的精确一般表达式。此外,我们还研究了n组分混合物的退混合效应,并证明混合-退混合临界点与n无关。

英文摘要:

Using the single-site Gutzwiller method, we theoretically study the ground state and the interspecies entanglement properties of interexchange symmetric multi-component (two- and three-) bosonic mixtures in an optical lattice, and the results are generalized to an $n$-component ($n=2,3,4,\cdots$) system. We compute the mean-field phase diagram, the interspecies entanglement entropy, and the ground state spectral decomposition. Three phases namely the $n$-component Superfluid state (nSF), the $n$-component Mott insulator state (nMI), and the Super-counter-fluid state (SCF) are observed. Interestingly, we find that there are $n-1$ SCF lobes to separate every two neighboring nMI lobes in the phase diagram. More importantly, we derive the exact general expression of the interspecies entanglement entropy for the SCF phase. In addition, we also investigate the demixing effect of an n-component mixture and demonstrate that the mixing-demixing critical point is independent of n.

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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