Relaxation Dynamics in the Spin-1 Heisenberg Antiferromagnetic Chain after a Quantum Quench of the Uniaxial Anisotropy

被引：4
|
作者：
Wozniak, D. [1 ]
Drzewinski, A. [1 ]
Kamieniarz, G. [2 ]
机构：
[1] Univ Zielona Gora, Inst Phys, Prof Z Szafrana 4a, PL-65516 Zielona Gora, Poland
[2] Adam Mickiewicz Univ, Fac Phys, Umultowska 85, PL-61614 Poznan, Poland
来源：
ACTA PHYSICA POLONICA A | 2016年 / 130卷 / 06期
关键词：
DENSITY-MATRIX RENORMALIZATION; PRODUCT STATES; SYSTEMS; FIDELITY;
D O I：
10.12693/APhysPolA.130.1395
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In the framework of the matrix product state representation the effect of a sudden turning on of the uniaxial anisotropy on the time evolution of the Haldane state has been investigated. Depending on the value of the uniaxial anisotropy parameter, the calculations were derived within (or outside) the region where the Haldane gap survives. An exact expression for the time evolution of the Loschmidt echo has been derived and, moreover, its collapse and revival behaviour was captured. In addition, the non-local order parameter of a time evolving state was tracked, revealing two types of relaxations.
引用
收藏
页码：1395 / 1400
页数：6
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