系综平均意义下的Hellmann-Feynman定理  

Hellmann-Feynman theorem based on ensemble average

作　　者：陈丽华 范洪义[2] CHEN Li-hua;FAN Hong-yi(College of Mechanic and Electronic Engineering,Wuyi University,Wuyishan,Fujian 354300,China;Department of Material Science and Engineering,University of Science and Technology of China,Hefei,Anhui 230026,China)

机构地区：[1]武夷学院机电工程学院,福建武夷山354300 [2]中国科学技术大学材料科学与工程系,安徽合肥230026

出　　处：《大学物理》2018年第11期4-5,12,共3页College Physics

摘　　要：本文将仅适用于纯态平均的Hellmann-Feynman定理推广到系综平均意义下的情况,并给出了其应用实例.The paper discusses how to extend the Hellmann-Feynman(H-F)theorem,which is just suitable for the pure state average,to the case of mixed state as ensemble average.Some applications of the generalized H-F theorem are presented.

关 键 词：系综平均 广义Hellmann-Feynman定理 

分 类 号：O413.1[理学—理论物理]