Quantum properties of classical Fisher information

被引：105
|
作者：
Hall, MJW [1 ]
机构：
[1] Australian Natl Univ, IAS, Canberra, ACT 0200, Australia
来源：
PHYSICAL REVIEW A | 2000年 / 62卷 / 01期
关键词：
D O I：
10.1103/PhysRevA.62.012107
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The Fisher information of a quantum observable is shown to be proportional to both (i) the difference of a quantum and a classical variance, thus providing a measure of nonclassicality; and (ii) the rate of entropy increase under Gaussian diffusion, thus providing a measure of robustness. The joint nonclassicality of position and momentum observables is shown to be complementary to their joint robustness in an exact sense.
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页数：6
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