Surface energy and elementary excitations of the XXZ spin chain with arbitrary boundary fields
Surface energy and elementary excitations of the XXZ spin chain with arbitrary boundary fields
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具有任意边界场的 XXZ 自旋链的表面能和基本激发
DOI：
10.1088/1751-8121/ab2259
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发表时间：
2019
影响因子：
2.1
通讯作者：
Yang Wen Li
中科院分区：
文献类型：
--
作者：
Sun Pei;Xin Zhi Rong;Qiao Yi;Hao Kun;Cao Like;Cao Junpeng;Yang Tao;Yang Wen Li
本文研究了XXZ自旋链在可积开边界条件下（即各向异性参数为真实的数）的热力学性质。结果表明，当系统N趋于无穷大时，非齐次项在基态和基元激发态的T-Q关系中的贡献可以忽略.得到了不平行边界磁场引起的表面能和元激发。
The thermodynamic properties of the XXZ spin chain with integrable open boundary conditions at the gaped region (ie the anisotropic parameter 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.