论文标题
2D Aubry-André模型中宏观超流量和绝缘层的障碍
Barriers to Macroscopic Superfluidity and Insulation in a 2D Aubry-André Model
论文作者
论文摘要
我们研究了在2D Aubry-André潜力存在下相互作用的玻色子的基态阶段。通过使用平均场渗透分析，我们专注于2D Aubry-André模型的几个超级晶格和准晶体机制，包括概括性的概括，这些概括性解释了电位的倾斜或偏斜。我们表明，宏观阶段发作的障碍自然来自2D Aubry-André模型中弱调制的域。这导致了混合相的形成，其中宏观特性由少数系统主导。当相比，相比，相图显示出大幅不同的特征，包括玻色玻璃的叶状或波浪状外观，锋利的挤出和延伸较弱的延伸域。通过研究跨多个制度的2D Aubry-André模型，我们表明混合相的独特特性与一小部分参数不同。
We study the ground state phases of interacting bosons in the presence of a 2D Aubry-André potential. By using a a mean-field percolation analysis, we focus on several superlattice and quasicrystalline regimes of the 2D Aubry-André model, including generalisations that account for a tilting or skewing of the potential. We show that barriers to the onset of macroscopic phases naturally arise from weakly modulated domains in the 2D Aubry-André model. This leads to the formation of mixed phases, in which the macroscopic properties are dominated by a minority of the system. The phase diagrams then exhibit substantially different features when compared against crystalline systems, including a lobe-like or wave-like appearance of the Bose glass, sharp extrusions and extended domains with weak percolation. By studying the 2D Aubry-André model across multiple regimes, we have shown that the unique properties of mixed phases are not distinct to a small set of parameters.
