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arXiv math-ph/0410032math-phcond-mat.dis-nnhep-thmath.MP
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三维双曲西格玛模型的自发对称性破缺

Spontaneous symmetry breaking of a hyperbolic sigma model in three dimensions

T. Spencer, M. R. Zirnbauer

摘要:

非线性西格玛模型,从超对称方法产生的无序电子系统包含一个非紧凑的玻色子部门。本文研究了目标空间为H^2的具有等距群SU(1,1)的双曲面模型,证明了在热力学极限下三维场的矩是有限的。因此非紧对称性SU(1,1)自发破缺。矩的约束与扩展态的存在是相容的。

英文摘要:

Non-linear sigma models that arise from the supersymmetric approach to disordered electron systems contain a non-compact bosonic sector. We study the model with target space H^2, the two-hyperboloid with isometry group SU(1,1), and prove that in three dimensions moments of the fields are finite in the thermodynamic limit. Thus the non-compact symmetry SU(1,1) is spontaneously broken. The bound on moments is compatible with the presence of extended states.

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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