Quantum fidelity and relative entropy between unitary orbits

被引：19
|
作者：
Zhang, Lin [1 ]
Fei, Shao-Ming [2 ,3 ]
机构：
[1] Hangzhou Dianzi Univ, Inst Math, Hangzhou 310018, Peoples R China
[2] Capital Normal Univ, Sch Math Sci, Beijing 100048, Peoples R China
[3] Max Planck Inst Math Sci, D-04103 Leipzig, Germany
来源：
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL | 2014年 / 47卷 / 05期
关键词：
quantum fidelity; relative entropy; bi-stochastic matrix; operator monotone function; COMPUTATION;
D O I：
10.1088/1751-8113/47/5/055301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Fidelity and relative entropy are two significant quantities in quantum information theory. We study the quantum fidelity and relative entropy under unitary orbits. The maximal and minimal quantum fidelity and relative entropy between two unitary orbits are explicitly derived. The potential applications in quantum computation and information processing are discussed.
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页数：10
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