Quantum backreaction of quantum fluid in Bose Einstein condensates  

作　　者：徐岩 熊祖周 陈兵 李照鑫 谭磊 

机构地区：[1]College of Science,Shandong University of Science & Technology [2]Institute of Theoretical Physics,Lanzhou University

出　　处：《Chinese Physics B》2009年第11期4734-4737,共4页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos 10704031 and 1087150);the Scientific Research Foundation for Returned Scholars, Ministry of Education of China;the Foundation of Shandong Educational Committee, China (Grant No J08LI60);the Research Project of ‘SUST Spring Bud',China (Grant No 2008AZZ093)

摘　　要：In this paper, with the full field operator ψ expressed in terms of a particle-number-conserving mean-field ansatz, we investigate the dynamical behaviour of Bose-Einstein condensates from microscopic physics. Including the first-order term correction from single-particle excitation and the remaining higher-order term correction from collective excitations simultaneously, we obtain the formulation for a closed local expression of quantum backreaction Q, and discuss the influence on static Bose-Einstein condensates. Even though the quantum backreaction is small, it still has some influence on its dynamics.In this paper, with the full field operator ψ expressed in terms of a particle-number-conserving mean-field ansatz, we investigate the dynamical behaviour of Bose-Einstein condensates from microscopic physics. Including the first-order term correction from single-particle excitation and the remaining higher-order term correction from collective excitations simultaneously, we obtain the formulation for a closed local expression of quantum backreaction Q, and discuss the influence on static Bose-Einstein condensates. Even though the quantum backreaction is small, it still has some influence on its dynamics.

关 键 词：Bose-Einstein condensate quantum fluctuation mean-field theory 

分 类 号：O469[理学—凝聚态物理]