不同边界下玻色爱因斯坦凝聚体杂质间的类Casimir力  

The Casimir-like effect between contaminants in ideal Bose-Einstein condensates with different boundary conditions

作　　者：邵琼仪 龙玉梅[1] 刘辉[1] 张雪[1] 杨慧[1] 郑泰玉[1] SHAO Qiong-yi;LONG Yu-mei;LIU Hui;ZHANG Xue;YANG Hui;ZHENG Tai-yu(School of Physics,Northeast Normal University,Changchun 130024,China)

机构地区：[1]东北师范大学物理学院

出　　处：《东北师大学报（自然科学版）》2019年第4期93-97,共5页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目（11175044）;吉林省教育厅资助项目（JJKH20181088KJ)

摘　　要：在引入参数下研究了5种不同边界条件下一维理想玻色爱因斯坦凝聚体中杂质间的类Casimir力,给出了这些边界下类Casimir力的通式.发现类Casimir力随杂质间距离增大而衰减,力的性质因边界不同表现为吸引或排斥.这说明当改变杂质满足的边界条件时可以改变类Casimir力的性质.同时,类Casimir力随玻色子质量的变化趋势也与边界条件有关.By introducing a new parameter,this paper concluded an usual expression to calculate the Casimir-like effect between contaminants in the one-dimensional ideal Bose-Einstein condensates with five different boundary conditions.It is found that these effect acting on contaminants all decay with distance but qualitatively different:some repulsive,others attractive.That depends on the boundary conditions imposed.This means we can modify the repulsive or attractive nature of effect acting on contaminants by changing the boundary condition that contaminants satisfied.At the same time,the figure that Casimir-like effect varies with the mass of boson is also sensitive to boundary condition.

关 键 词：玻色爱因斯坦凝聚 类Casimir力 边界条件 

分 类 号：O469[理学—凝聚态物理]