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.
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页数：21
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