摘要
给出了不同于文献的势场中玻色 爱因斯坦凝聚临界温度表达式.结果揭示了势场中理想玻色子气体凝聚的 临界温度与势场之间的关系,表明势场中临界温度正比于无势场情况下临界温度T0c,还给出了势场的有效性判 据.势场的有效性是势场与玻尔兹曼常数k和无势场情况下临界温度T0c乘积kT0c的比较.当势场接近或大于kT0c 时,临界温度会有效增加;当势场远小于kT0c时,势场是无效的.
Expressions for critical temperature of Bose-Einstein condensation (BEC) in an external potential,which are different from published results in the literature,are presented. The results reveal the relation between the critical temperature of BEC gas and the external potential,and demonstrates proportionality of critical temperature in external potential to the value T 0 c at which the potential is absent. In addition,a criterion for the validity of potential is also presented,which is based on the comparison between the potential and the product kT 0 c. This comparison shows that only when the external potential is nearly equal to or larger than kT 0 c,the increase of critical temperature is significant. As the potential is much smaller than kT 0 c,the potential has no effects on the BEC gas.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第12期4075-4079,共5页
Acta Physica Sinica
