Quantum Spin Chains with Site Dissipation

被引：0

作者：

Werner, Philipp ^{[1
]}

Troyer, Matthias ^{[1
,2
]}

Sachdev, Subir ^{[3
]}

机构：

[1] ETH Honggerberg, Inst Theoret Phys, CH-8093 Zurich, Switzerland

[2] ETH, Computat Lab, CH-8092 Zurich, Switzerland

[3] Yale Univ, Dept Phys, New Haven, CT 06520 USA

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2005年 / 74卷

基金：

瑞士国家科学基金会;

关键词：

spin chains; dissipation; phase transition; Monte Carlo;

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use Monte Carlo simulations to study chains of Ising- and XY-spins with dissipation coupling to the site variables. The phase diagram and critical exponents of the dissipative Ising chain in a transverse magnetic field have been computed previously, and here we consider a universal ratio of susceptibilities. We furthermore present the phase diagram and exponents of the dissipative XY-chain, which exhibits a second order phase transition. All our results compare well with the predictions from a dissipative phi(4) field theory.

引用

页数：4

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