Entropy and Wigner functions

被引：87
|
作者：
Manfredi, G
Feix, MR
机构：
[1] Univ Henri Poincare, Phys Milieux Ionises Lab, F-54506 Vandoeuvre Les Nancy, France
[2] Ecole Mines Nantes, Subatech, F-44307 Nantes 3, France
来源：
PHYSICAL REVIEW E | 2000年 / 62卷 / 04期
关键词：
D O I：
10.1103/PhysRevE.62.4665
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The properties of an alternative definition of quantum entropy, based on Wigner functions, are discussed. Such a definition emerges naturally from the Wigner representation of quantum mechanics, and can easily quantify the amount of entanglement of a quantum state. It is shown that smoothing of the Wigner function induces an increase in entropy. This fact is used to derive some simple rules to construct positive-definite probability distributions which are also admissible Wigner functions.
引用
收藏
页码：4665 / 4674
页数：10
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