基于Wigner函数的一些量子熵的定义
收稿日期: 2018-09-07
修回日期: 2018-11-09
网络出版日期: 2019-04-25
基金资助
国家自然科学基金( 11405060,11571119) 资助
Some definitions of quantum entropy based on Wigner function
Received date: 2018-09-07
Revised date: 2018-11-09
Online published: 2019-04-25
林冰生, 衡太骅 . 基于Wigner函数的一些量子熵的定义[J]. 大学物理, 2019 , 38(3) : 1 -3 . DOI: 10.16854 /j.cnki.1000-0712.180498
and several different definitions of them based on Wigner functions in phase space,are introduced respectively.
Through some theoretical deductions and numerical calculations,the definitions of quantum entropy in phase
space using the absolute value of Wigner function in the literatures are proved to be inappropriate. The quantum entropy
defined in this paper by the Moyal star product of Wigner function is consistent with that defined by density
matrices.
Key words: Wigner function; von Neumann entropy; Tsallis entropy; Rényi entropy; linear entropy
/
| 〈 |
|
〉 |