量子光学组会第三周报告

时间：9月22日晚上 19：30

地点：材料科学与基础学科大楼二楼大会议室

      请所有老师和研究生尽量准时参加，欢迎物理学科本科生旁听。

报告题目：Ultra-cold gases---A “hot” dish of the “coldest” matter in physics

报 告 人：刘博老师

报告摘要： Since the observation of Bose-Einstein condensation and of superfluidity in atomic gases, ultracold quantum gases have become a very versatile tool to explore new quantum states of matter. Because of the highly controllable and clean environment in atomic systems, it is hoped that they will not only provide a perfect simulator of electronic systems, but also opportunities to create new types of quantum states with no counterpart in solids. Since the atom-light interaction induced synthetic gauge potential has been successfully implemented by I. B. Spielman’s group in NIST, the synthetic magnetic field, electric field as well as spin-orbit coupling have been created in the later experiments. It provides a new platform to study fascinating quantum states of matter in such synthetic materials. Besides, recent experimental progress in manipulating higher orbital bands in optical lattices provides another unprecedented opportunity to investigate quantum many-body phases with orbital degrees of freedom. The study of such synthetic orbital matters in optical lattices could be extremely helpful to design of real materials.

 In this talk, experimentally feasible routes with cold gases based systems to achieve several kinds of new quantum states of matter will be introduced, such as topological insulators\superconductors[1, 2, 3]. They will be not only useful for the next-generation quantum technology, like topological quantum computer/quantum information, but also be important to understand high-energy/particle physics [4].

参考文献：[1] B. Liu, X. Li, B. Wu and W. V. Liu, Nat. Commun. 5, 5064 (2014).
[2] B. Liu, X. Li, R. G. Hulet and W. V. Liu, Phys. Rev. A 94, 031602  (2016). 

[3] B. Liu, X. Li and W. V. Liu, Phys. Rev. A 93, 033643 (2016).

[4] B. Liu, X. Li, L. Yin and W. V. Liu, Phys. Rev. Lett. 114, 045302 (2015).