Many-body dynamical delocalization in a kicked one-dimensional ultracold gas

被引:16
作者
Toh, Jun Hui See [1 ]
McCormick, Katherine C. [1 ]
Tang, Xinxin [1 ]
Su, Ying [2 ]
Luo, Xi-Wang [2 ]
Zhang, Chuanwei [2 ]
Gupta, Subhadeep [1 ]
机构
[1] Univ Washington, Dept Phys, Seattle, WA 98195 USA
[2] Univ Texas Dallas, Dept Phys, Richardson, TX 75083 USA
基金
美国国家科学基金会;
关键词
INTERACTING BOSE-GAS; QUANTUM; LOCALIZATION; BOSONS; SYSTEM;
D O I
10.1038/s41567-022-01721-w
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Contrary to a driven classical system that exhibits chaotic behaviour and diffusive energy growth, a kicked quantum system can exhibit the emergence of dynamical localization, which limits energy absorption and leads to the breakdown of ergodicity(1-4). The evolution of dynamically localized states in the presence of many-body interactions has long remained an open questions(5-7). Here we experimentally study an interacting one-dimensional ultracold gas periodically kicked by a pulsed optical lattice and observe the interaction-driven emergence of dynamical delocalization and many-body quantum chaos. The observed dynamics feature sub-diffusive energy growth over a broad parameter range of interaction and kick strengths. These results shed light on interaction-driven transport phenomena in quantum many-body systems, in a regime where theoretical approaches are extremely challenging and provide conflicting predictions.
引用
收藏
页码:1297 / +
页数:6
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