Unconventional Bose–Einstein Condensations from Spin-Orbit Coupling

作     者：WU Cong-Jun Ian Mondragon-Shem ZHOU Xiang-Fa 吴从军;Ian Mondragon-Shem;周祥发

作者机构：Department of PhysicsUniversity of CaliforniaSan DiegoCA 92093 Instituto de FísicaUniversidad de AntioquiaAA 1226MedellínColombia Key Laboratory of Quantum InformationUniversity of Science and Technology of ChinaHefei 230026 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2011年第28卷第9期

页      面：217-220页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：by US NSF-DMR 1105945 and AFOSR-YIP program.X.F.Z.acknowledges the support of CUSF  SRFD(20103402120031)and the China Postdoctoral Science 

主　　题：interaction mechanism Einstein 

摘      要：According to theno-nodetheorem,the many-body ground state wavefunctions of conventional Bose–Einstein condensations(BEC)are positive-definite,thus time-reversal symmetry cannot be spontaneously *** find that multi-component bosons with spin-orbit coupling provide an unconventional type of BECs beyond this *** focus on a subtle case of isotropic Rashba spin-orbit coupling and the spin-independent *** the limit of the weak confining potential,the condensate wavefunctions are frustrated at the Hartree–Fock level due to the degeneracy of the Rashba *** zero-point energy selects the spin-spiral type condensate through theorder-from-disorder*** a strong harmonic confining trap,the condensate spontaneously generates a half-quantum vortex combined with the skyrmion type of spin *** both cases,time-reversal symmetry is spontaneously *** phenomena can be realized in both cold atom systems with artificial spin-orbit couplings generated from atom-laser interactions and exciton condensates in semi-conductor systems.