Entropy Change in Quantum Measurements for Infinite-Dimensional Quantum Systems

被引：1
|
作者：
Duan, Zhoubo [1 ]
Hou, Jinchuan [1 ]
机构：
[1] Taiyuan Univ Technol, Dept Math, Taiyuan 030024, Shanxi, Peoples R China
来源：
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2019年 / 58卷 / 02期
基金：
美国国家科学基金会;
关键词：
Infinite-dimensional systems; Quantum measurement; Entropy change; Information transfer; INFORMATION;
D O I：
10.1007/s10773-018-3946-5
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this paper, first, we prove the projective measurement increases the entropy in infinite-dimensional quantum systems, and discuss some useful properties for the study of entropy changes in quantum measurement. Next, we introduce a joint purification framework which keeps track of all the information transfer in a quantum measurement. Based on this joint purification which encodes the various entropies arising from the most general quantum measurement, we establish several information conservation and entropic relations in infinite-dimensional case.
引用
收藏
页码：463 / 471
页数：9
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