Spontaneous U(1) Symmetry Breaking in Coupled Bose System  

作　　者：王影 徐金荣 陈理 刘果红 

机构地区：[1]Department of Mathematics and Physics,Anhui University of Architecture [2]Department of Physics,Southeast University

出　　处：《Communications in Theoretical Physics》2011年第6期997-1000,共4页理论物理通讯（英文版）

摘　　要：Adding a U（1） symmetry breaking term √V（λ1a0 ＋ λ1＊a0） ＋ √V（λ2b0 ＋ λ2＊b0） to Bogoliubov＇s truncated Hamiltonian HB for a weakly interacting coupled Bose system, by using the mean-field approximation rather than the c-number approximation, we And that, via a Feshbach resonance at zero temperature, the states of the coupled Bose system are generalized SU（1,1） SU（1,1） coherent states. The Bose-Einstein condensation occurs in response to the spontaneous U（1） symmetry breaking.

关 键 词：BEC U（1） symmetry breaking generalized SU（1 1） SU（1 1） coherent state Feshbach resonance 

分 类 号：O469[理学—凝聚态物理]