Surface energy and elementary excitations of the XXZ spin chain with arbitrary boundary fields

被引：5
|
作者：
Sun, Pei [1 ,2 ]
Xin, Zhi-Rong [1 ,2 ]
Qiao, Yi [1 ,2 ,3 ]
Hao, Kun [1 ,2 ]
Cao, Like [2 ,4 ]
Cao, Junpeng [3 ,5 ,6 ]
Yang, Tao [1 ,2 ,4 ]
Yang, Wen-Li [1 ,2 ,4 ]
机构：
[1] Northwest Univ, Inst Modern Phys, Xian 710127, Shaanxi, Peoples R China
[2] Shaanxi Key Lab Theoret Phys Frontiers, Xian 710127, Shaanxi, Peoples R China
[3] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[4] Northwest Univ, Sch Phys, Xian 710127, Shaanxi, Peoples R China
[5] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China
[6] Univ Chinese Acad Sci, Sch Phys Sci, Beijing, Peoples R China
来源：
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL | 2019年 / 52卷 / 26期
基金：
中国国家自然科学基金; 澳大利亚研究理事会;
关键词：
thermodynamic Bethe ansatz; T-Q relation; surface energy; elementary excitation; THERMODYNAMIC LIMIT; ASHKIN-TELLER; STATES; POTTS; MODEL;
D O I：
10.1088/1751-8121/ab2259
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The thermodynamic properties of the XXZ spin chain with integrable open boundary conditions at the gaped region (i.e. the anisotropic parameter eta being a real number) are investigated. It is shown that the contribution of the inhomogeneous term in the T - Q relation of the ground state and elementary excited state can be neglected when the size of the system N tends to infinity. The surface energy and elementary excitations induced by the unparallel boundary magnetic fields are obtained.
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页数：19
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