Out of equilibrium correlation functions of quantum anisotropic XY models:: one-particle excitations

被引：21

作者：

Amico, L

Osterloh, A

机构：

[1] NEST, INFM, I-95125 Catania, Italy

[2] DMFCI, I-95125 Catania, Italy

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 2004年 / 37卷 / 02期

关键词：

D O I：

10.1088/0305-4470/37/2/001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We calculate exactly matrix elements between non-equilibrium excitations of the quantum XY model for general anisotropy. These matrix elements are expressed as a sum of Pfaffians. For single particle excitations on the ground state, the Pfaffians in the sum simplify to determinants.

引用

页码：291 / 302

页数：12

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