Evolution of the magnetization after a local quench in the critical transverse-field Ising chain

被引：7

作者：

Igloi, Ferenc ^{[1
,2
,3
]}

Roosz, Gergo ^{[1
,2
]}

Turban, Loic ^{[3
,4
]}

机构：

[1] Wigner Res Ctr, Inst Solid State Phys & Opt, H-1525 Budapest, Hungary

[2] Univ Szeged, Inst Theoret Phys, H-6720 Szeged, Hungary

[3] Univ Lorraine, Inst Jean Lamour, UMR 7198, F-54506 Nancy, France

[4] CNRS, Inst Jean Lamour, UMR 7198, F-54011 Nancy, France

来源：

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT | 2014年

关键词：

conformal field theory (theory); spin chains; ladders and planes (theory); quantum phase transitions (theory); QUANTUM SPIN CHAINS; CONFORMAL-INVARIANCE; STATISTICAL-MECHANICS; XY-MODEL; CRITICAL-BEHAVIOR; DEFECTS; SYSTEMS; RELAXATION; LINE; ENTANGLEMENT;

D O I：

10.1088/1742-5468/2014/03/P03023

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We study the time evolution of the local magnetization in the critical Ising chain in a transverse field after a sudden change of the parameters at a defect. The relaxation of the defect magnetization is algebraic and the corresponding exponent. which is a continuous function of the defect parameters, is calculated exactly. In finite chains the relaxation is oscillating in time and its form is conjectured on the basis of precise numerical calculations.

引用

页数：21

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