The two-spinon transverse structure factor of the gapped Heisenberg antiferromagnetic chain

被引：34
作者：
Caux, Jean-Sebastien [1 ]
Mossel, Jorn [1 ]
Castillo, Isaac Perez [2 ]
机构：
[1] Univ Amsterdam, Inst Theoret Phys, NL-1018 XE Amsterdam, Netherlands
[2] Kings Coll London, Dept Math, London WC2R 2LS, England
来源：
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT | 2008年
关键词：
correlation functions; form factors; integrable spin chains (vertex models); spin chains; ladders and planes (theory);
D O I：
10.1088/1742-5468/2008/08/P08006
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
We consider the transverse dynamical structure factor of the anisotropic Heisenberg spin-1/2 chain (XXZ model) in the gapped antiferromagnetic regime (Delta> 1). Specializing to the case of zero field, we use two independent approaches based on integrability (one valid for finite size, the other for the infinite lattice) to obtain the exact two-spinon part of this correlator. We discuss in particular its asymmetry with respect to the pi/2-momentum line, its overall anisotropy dependence, and its contribution to sum rules.
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页数：20
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