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摘要翻译：
研究了易轴为z的S=1/2铁磁伊辛自旋链在磁场H={h_x,0,h_z}中的激发能谱。根据Wu和McCoy的弱约束情形，在h_z=0的有序相中，自由的费米子自旋子激发（扭结）在任意小的h_z处耦合到波声束缚态。我们用不同的微扰方法计算了小h_z下这类激发的能谱。
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英文标题：
《Energy spectrum of bound-spinons in the quantum Ising spin-chain
ferromagnet》
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作者：
S. B. Rutkevich
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最新提交年份：
2007
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分类信息：
一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
We study the excitation energy spectrum in the S=1/2 ferromagnetic Ising spin chain with the easy axis z in a magnetic field h={h_x,0,h_z}. According to Wu and McCoy's scenario of weak confinement, the fermionic spinon excitations (kinks), being free at h_z = 0 in the ordered phase, are coupled into bosonic bound states at arbitrary small h_z. We calculate the energy spectrum of such excitations in the leading order in small h_z, using different perturbative methods developed for the similar problem in the Ising field theory.
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PDF链接：
https://arxiv.org/pdf/712.3189
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