Kind of entanglement that speeds up quantum evolution

被引：73

作者：

Froewis, F. ^{[1
]}

机构：

[1] Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria

来源：

PHYSICAL REVIEW A | 2012年 / 85卷 / 05期

基金：

奥地利科学基金会;

关键词：

STATISTICAL DISTANCE; GEOMETRY;

D O I：

10.1103/PhysRevA.85.052127

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The "speed" of unitary quantum evolution was recently shown to be connected to entanglement in multipartite quantum systems. Here, we discuss a tighter version of the Mandelstam-Tamm uncertainty relation that depends on the Fisher information. The passage time is estimated by a lower bound that depends inversely proportional to the square root of the Fisher information. This leads to a better understanding of the origin of a fast quantum time-evolution of entangled states.

引用

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