大学物理 ›› 2018, Vol. 37 ›› Issue (11): 4-5.doi: 10.16854 /j.cnki.1000-0712.180209

• 教学研究 • 上一篇    下一篇

系综平均意义下的Hellmann-Feynman 定理

陈丽华,范洪义   

  1. 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
  • 收稿日期:2018-03-31 修回日期:2018-05-24 出版日期:2018-11-20 发布日期:2018-11-20
  • 作者简介:陈丽华(1972—),女,福建浦城人,武夷学院机电工程学院讲师,硕士,主要研究方向量子光学及量子信息

Hellmann-Feynman theorem based on ensemble average

CHEN Li-hua1,FAN Hong-yi 2   

  1. 1. College of Mechanic and Electronic Engineering,Wuyi University,Wuyishan,Fujian 354300,China; 2. Department of Material Science and Engineering,University of Science and Technology of China,Hefei,Anhui 230026,China
  • Received:2018-03-31 Revised:2018-05-24 Online:2018-11-20 Published:2018-11-20

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.

关键词: 系综平均, 广义Hellmann-Feynman 定理

Abstract: 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.

Key words: ensemble average, generalized Hellmann-Feynman theorem