摘要翻译:
对于自旋s=1/2,1的Ising链,我们得到了两个互补的准粒子集的排斥统计量。在s=1/2的情况下,这两组是反铁磁畴壁(孤子)和铁磁畴(弦)。在s=1的情况下,它们分别是孤子对和嵌套弦。当s=1/2时,Ising模型等价于两种孤子系统;当s=1时,Ising模型等价于六种孤子对系统。孤子存在于单键上,但孤子对可能分布在多个键上。一个跨越到$M$晶格位的区域系统的热力学是易于精确分析的,并表明在极限m->无穷大范围内与s=1/2Ising链的热力学是等价的。给出了S=1/2XXZ链的Ising极限孤子与XX极限自旋子之间的关系。
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英文标题:
《Statistically interacting quasiparticles in Ising chains》
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作者:
Ping Lu, Jared Vanasse, Christopher Piecuch, Michael Karbach, and
Gerhard Muller
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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:
The exclusion statistics of two complementary sets of quasiparticles, generated from opposite ends of the spectrum, are identified for Ising chains with spin s=1/2,1. In the s=1/2 case the two sets are antiferromagnetic domain walls (solitons) and ferromagnetic domains (strings). In the s=1 case they are soliton pairs and nested strings, respectively. The Ising model is equivalent to a system of two species of solitons for s=1/2 and to a system of six species of soliton pairs for s=1. Solitons exist on single bonds but soliton pairs may be spread across many bonds. The thermodynamics of a system of domains spanning up to $M$ lattice sites is amenable to exact analysis and shown to become equivalent, in the limit M -> infinity, to the thermodynamics of the s=1/2 Ising chain. A relation is presented between the solitons in the Ising limit and the spinons in the XX limit of the s=1/2 XXZ chain.
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PDF链接:
https://arxiv.org/pdf/710.1687