Investigating many-body mobility edges in isolated quantum systems
Investigating many-body mobility edges in isolated quantum systems
复制标题
研究孤立量子系统中的多体移动边缘
DOI：
10.1103/physrevb.99.165137
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发表时间：
2019
影响因子：
3.7
通讯作者：
Mondaini Rubem
中科院分区：
文献类型：
--
作者：
Wei Xingbo;Cheng Chen;Gao Xianlong;Mondaini Rubem
在描述多体局域现象出现后，封闭量子系统中多体迁移率边的存在一直是激烈争论的焦点。在这里，我们建议可以通过研究局部自由度的时间演化来解决这个问题，局部自由度是为特定的能量和初始状态量身定做的。一个具有指数长程隧穿振幅的无自旋费米子相互作用模型被用作包含最近邻相互作用的起点，该模型的非相互作用版本显示了单粒子的迁移率边缘。我们通过使用许多探头验证了多体运动边缘的表现，这表明人们不能仅仅将它们的出现解释为有限大小效应的结果。
The existence of many-body mobility edges in closed quantum systems has been the focus of intense debate after the emergence of the description of the many-body localization phenomenon. Here we propose that this issue can be settled in experiments by investigating the time evolution of local degrees of freedom, tailored for specific energies and initial states. An interacting model of spinless fermions with exponentially long-ranged tunneling amplitudes, whose non-interacting version known to display single-particle mobility edges, is used as the starting point upon which nearest-neighbor interactions are included. We verify the manifestation of many-body mobility edges by using numerous probes, suggesting that one cannot explain their appearance as merely being a result of finite-size effects.