Quantum estimation of relative information

被引：10

作者：

Lindner, NH ^{[1
]}

Scudo, PF

Bruss, D

机构：

[1] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[2] Univ Dusseldorf, Inst Theoret Phys 3, D-40225 Dusseldorf, Germany

来源：

INTERNATIONAL JOURNAL OF QUANTUM INFORMATION | 2006年 / 4卷 / 01期

关键词：

quantum state estimation; optimal measurement; quantum encoding; spin coherent states;

D O I：

10.1142/S0219749906001657

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

We derive optimal schemes for preparation and estimation of relational degrees of freedom between two quantum systems. We specifically analyze the case of rotation parameters representing relative angles between elements of the SU(2) symmetry group. Our estimation procedure does not assume prior knowledge of the absolute spatial orientation of the systems and as such does not require information on the underlying classical reference frame in which the states are prepared.

引用

页码：131 / 149

页数：19

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