Non-zero entropy density in the XY chain out of equilibrium

被引：9

作者：

Aschbacher, Walter H. ^{[1
]}

机构：

[1] Tech Univ Munich, Zentrum Math, D-85747 Garching, Germany

来源：

LETTERS IN MATHEMATICAL PHYSICS | 2007年 / 79卷 / 01期

关键词：

non-equilibrium steady state; XY chain; von Neumann entropy; Toeplitz operators;

D O I：

10.1007/s11005-006-0115-1

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The von Neumann entropy density of a block of n spins is proved to be non-zero for large n in the non-equilibrium steady state of the XY chain constructed by coupling a finite cutout of the chain to the two infinite parts to its left and right which act as thermal reservoirs at different temperatures. Moreover, the non-equilibrium density is shown to be strictly greater than the density in thermal equilibrium.

引用

页码：1 / 16

页数：16

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