Superballistic diffusion of entanglement in disordered spin chains

被引：23

作者：

Fitzsimons, J ^{[1
]}

Twamley, J

机构：

[1] Natl Univ Ireland, Dept Math Phys, Maynooth, Kildare, Ireland

[2] Macquarie Univ, Ctr Quantum Comp Technol, Sydney, NSW 2109, Australia

来源：

PHYSICAL REVIEW A | 2005年 / 72卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.72.050301

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the dynamics of a single excitation in an infinite XXZ spin chain, which is launched from the origin. We study the time evolution of the spread of entanglement in the spin chain and obtain an expression for the second-order spatial moment of concurrence, about the origin, for both ordered and disordered chains. In this way, we show that a finite central disordered region can lead to sustained superballistic growth in the second-order spatial moment of entanglement within the chain.

引用

页数：4

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