论文标题
横跨超级流体到Mott绝缘体过渡的晶格极化物
Lattice polarons across the superfluid to Mott insulator transition
论文作者
论文摘要
我们研究限制在晶格中的移动杂质的物理学，在零温度下移动在玻色式浴室中。在量子Gutzwiller形式主义中，我们开发了一个超越浴缸相互作用模型。在整个相图中介绍了由浴室量子波动形成的二极化准粒子的性能，重点是超级流体和莫特绝缘相之间的量子相变。在这里，我们发现杂质特性的修改对过渡的不同普遍性类别高度敏感，从而在量子关键的多体环境中提供了相关性和集体模式的明确探针。
We study the physics of a mobile impurity confined in a lattice, moving within a Bose-Hubbard bath at zero temperature. Within the Quantum Gutzwiller formalism, we develop a beyond-Fröhlich model of the bath-impurity interaction. Results for the properties of the polaronic quasiparticle formed from the dressing of the impurity by quantum fluctuations of the bath are presented throughout the entire phase diagram, focusing on the quantum phase transition between the superfluid and Mott insulating phases. Here we find that the modification of the impurity properties is highly sensitive to the different universality classes of the transition, providing an unambiguous probe of correlations and collective modes in a quantum critical many-body environment.
