Topological orbital optical lattices with bosons

具有玻色子的拓扑轨道光学晶格

• 批准号: 368544644
• 负责人: Professor Dr. Andreas Hemmerich
• 金额: --
• 依托单位: Institut für Laser-Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/368544644?language=en
• 关键词: Topological; orbital; optical; lattices; bosons

The emergence of topological properties in interacting many-body quantum systems is only vaguely understood to date. The use of bosonic atoms loaded into optical lattices opens up an entirely new, yet unexplored world of interacting topological many-body quantum systems not realized in electronic condensed matter. The objective of this proposal is the implementation and study of chiral Bose-Einstein condensates with interaction-induced topological excitations. The proposed research is based upon two recent works of a collaboration of the applicant with two international theory teams. In these works two realistic optical lattice scenarios are proposed and studied, which do not yield topological properties for a single atom, while in the case of many interacting atoms intriguing chiral ground states with rectified interaction-driven vortical currents arise, which exhibit topological excitations. The proposed research aims to identify the predicted topological character via studying the Berry curvature and the presence of chiral edge states.

迄今为止，人们对相互作用的多体量子系统中拓扑特性的出现还知之甚少。使用加载到光学晶格中的玻色子原子开辟了一个全新的、尚未探索的相互作用的拓扑多体量子系统的世界，而这在电子凝聚态物质中尚未实现。该提案的目的是实现和研究具有相互作用引起的拓扑激发的手性玻色-爱因斯坦凝聚态。拟议的研究基于申请人与两个国际理论团队最近合作的两项工作。在这些工作中，提出并研究了两种现实的光学晶格场景，它们不会产生单个原子的拓扑性质，而在许多相互作用的原子的情况下，会产生具有整流相互作用驱动的涡流的有趣的手性基态，从而表现出拓扑激发。拟议的研究旨在通过研究贝里曲率和手性边缘态的存在来识别预测的拓扑特征。

项目成果

Orbital Many-Body Dynamics of Bosons in the Second Bloch Band of an Optical Lattice.

• DOI: 10.1103/physrevlett.126.200402
• 发表时间: 2020-08
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: J. Vargas;M. Nuske;R. Eichberger;C. Hippler;L. Mathey;A. Hemmerich

Metastable order protected by destructive many-body interference

受破坏性多体干扰保护的亚稳态秩序

• DOI: 10.1103/physrevresearch.2.043210
• 发表时间: 2020
• 作者: M. Nuske;J. Vargas;M. Hachmann;R. Eichberger;L. Mathey;A. Hemmerich
• 通讯作者: A. Hemmerich