Pathway toward the formation of supermixed states in ultracold boson mixtures loaded in ring lattices
Pathway toward the formation of supermixed states in ultracold boson mixtures loaded in ring lattices
复制标题
环晶格中超冷玻色子混合物形成超混合态的途径
作者：
A. Richaud;V. Penna
研究了加载在环形晶格中的玻色二元混合物中超混合类孤子态的形成机制。我们的证据存在一个共同的途径，不考虑晶格位点的数量和物种间的吸引力的变化，导致系统从一个混合和离域相的超混合和本地化的，通过一个中间阶段的超混合孤子逐步出现。的混合，本地化和量子相关性的两个凝聚态的物种，量化的手段，常用的统计热力学和量子信息理论的合适的指标，允许一个重建的二维混合超混合相图具有两个特征的临界线。我们的分析是在一个半经典的方法，能够捕捉到的两步混合-分层过渡的基本特征，并与一个完全量子的方法。
We investigate the mechanism of formation of supermixed soliton-like states in bosonic binary mixtures loaded in ring lattices. We evidence the presence of a common pathway which, irrespective of the number of lattice sites and upon variation of the interspecies attraction, leads the system from a mixed and delocalized phase to a supermixed and localized one, passing through an intermediate phase where the supermixed soliton progressively emerges. The degrees of mixing, localization and quantum correlation of the two condensed species, quantified by means of suitable indicators commonly used in Statistical Thermodynamics and Quantum Information Theory, allow one to reconstruct a bi-dimensional mixing-supermixing phase diagram featuring two characteristic critical lines. Our analysis is developed both within a semiclassical approach capable of capturing the essential features of the two-step mixing-demixing transition and with a fully-quantum approach.