Bethe-Ansatz专家管习文来我组作系列报告[2017-11-10]
Topological Phase Transition and Charge Pumping in a One-Dimensional Periodically Driven Optical Lattice[2017-07-30]
山西大学2017研究生毕业典礼[2017-06-25]
CAT小组刘彦霞同学通过博士学位论文答辩[2017-06-03]
王利CSC公派访学结束回所工作[2017-05-22]
尹相国回到冷原子理论研究组工作[2017-04-13]
Spectroscopy and spin dynamics for strongly interacting few spinor bosons in one-dimensional traps[2017-04-06]
Collective excitation of a trapped Bose-Einstein condensate with spin-orbit coupling [2017-03-16]
Quantum walks in the commensurate off-diagonal AAH model[2017-02-03]
刘娜获得2016硕士国家奖学金[2017-01-12]

发布者： admin 发布时间：2016-04-01

　　

2016.3.30日，台湾国立清华大学和中国科学院等单位合作理论提出在双层结构的BEC中实现Rashba型自旋轨道耦合，文章在线发表于arXiv:1603.09043。

Abstract: We explore a new way of producing the Rasba spin-orbit coupling (SOC) for ultracold atoms by using a two-component (spinor) atomic Bose-Einstein condensate (BEC) confined in a bilayer geometry. The SOC of the Rashba type is created if the atoms pick up a phase after completing a cyclic transition between four combined spin-layer states composed of two spin and two layer states. The cyclic coupling of the spin-layer states is carried out by combining an intralayer Raman coupling and an interlayer laser assisted tunneling. We theoretically determine the ground-state phases of the spin-orbit-coupled BEC for various strengths of the atom-atom interaction and the laser-assisted coupling. It is shown that the bilayer scheme provides a diverse ground-state phase diagram. In an intermediate range of the atom-light coupling two interlacing lattices of halfskyrmions and half-antiskyrmions are spontaneously created. In the strong-coupling regime, where the SOC of the Rashba-type is formed, the ground state represents plane-wave or standing-wave phases depending on the interaction between the atoms. A variational analysis is shown to be in a good agreement with the numerical results.