一个带阻尼项Josephson振动的半经典模型  

A semi-classical model of the damping Josephson junction for the Bose-Einstein Condensates

作　　者：罗运文[1] 

机构地区：[1]漳州师范学院物理与电子信息工程系,漳州363000

出　　处：《低温与超导》2008年第6期48-50,共3页Cryogenics and Superconductivity

摘　　要：在双势阱模型的基础上考虑了Josephson流与凝聚体的相互作用而引起的阻尼效应,得出相对粒子数Z(t)的表达式,并用一个简单的碰撞模型得出Josephson振动的振幅和能量及随时间呈指数衰减,以及凝聚体的质量越大,衰减越慢。In this paper, we think of the damping effect made by the action between Josephson junction and condensate, and conclude the expression of the fractional population imbalance z（t） by modifying the two - mode GP equation, and we use a simple collision model and conclude the amplitude and energy of Josephson junction damps with time in a exponent way , and the more the mass of condensate is , the slower the damping is.

关 键 词：玻色_爱因斯坦凝聚态(BEC) JOSEPHSON效应 碰撞模型 

分 类 号：O441.2[理学—电磁学] TP391.9[理学—物理]