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arXiv 1012.4529hep-thcond-mat.softmath-phmath.MPquant-ph
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扭结-反扭结晶体的奇异超对称性和无限周期极限

Exotic supersymmetry of the kink-antikink crystal, and the infinite period limit

Mikhail S. Plyushchay, Adrian Arancibia, Luis-Miguel Nieto

摘要:

不久前,Thies等人证明了带有裸质量项的Gross-Neveu模型具有扭结-反扭结结晶相。相应的自洽的解决方案,在聚合物物理学中已知的早期,描述了一个自等谱对的一个间隙周期性拉梅潜力与达布位移取决于裸质量。我们研究了这样一个二阶Lame系统的一种不寻常的超对称性,并证明了相应的一阶Bogoliubov-de Gennes哈密顿量具有自己的非线性超对称性。Witten指数被确定为零的两个相关的异国情调的超对称结构,其中每一个承认几个替代品的选择一个分级操作。一个恢复的离散手征对称性在零值的裸质量,当扭-反扭结晶凝聚体转化为扭晶体,被证明是伴随着结构的变化,在这两个超对称性。我们发现,无限周期的限制可能会或可能不会改变指数。我们还解释了最近在一个非周期性的自等谱单能隙Poschl-Teller系统中观察到的Darboux dressing现象的起源,该系统描述了Dashen,Hasslacher和Neveu的扭结-反扭结重子。

英文摘要:

Some time ago, Thies et al. showed that the Gross-Neveu model with a bare mass term possesses a kink-antikink crystalline phase. Corresponding self-consistent solutions, known earlier in polymer physics, are described by a self-isospectral pair of one-gap periodic Lame potentials with a Darboux displacement depending on the bare mass. We study an unusual supersymmetry of such a second order Lame system, and show that the associated first order Bogoliubov-de Gennes Hamiltonian possesses the own nonlinear supersymmetry. The Witten index is ascertained to be zero for both of the related exotic supersymmetric structures, each of which admits several alternatives for the choice of a grading operator. A restoration of the discrete chiral symmetry at zero value of the bare mass, when the kink-antikink crystalline condensate transforms into the kink crystal, is shown to be accompanied by structural changes in both of the supersymmetries. We find that the infinite period limit may or may not change the index. We also explain the origin of the Darboux dressing phenomenon recently observed in a non-periodic self-isospectral one-gap Poschl-Teller system, which describes kink-antikink baryons of Dashen, Hasslacher and Neveu.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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