科研之友
微信
新浪微博
Facebook
分享链接
摘要
By virtue of the technique of integration within an ordered product of operators, we present a new approach for deriving the generalized thermo vacuum state which is simpler in form than that obtained from the Takahashi-Umezawa method. using this new approach, the thermo field dynamics can be developed. Applications of the new state are discussed.
