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arXiv 0711.3756math-phhep-lathep-thmath.MP
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关于双曲型西格玛模型的大N展开

On the large N expansion in hyperbolic sigma-models

Max Niedermaier, Erhard Seiler

摘要:

研究了${\rm SO}(1,N)$双曲西格玛模型的不变关联函数。证明了在$d \geq 2$维有限格上存在一个大的$N$渐近展开式.独特的鞍点配置的特点是由一个负的间隙消失至少像1/V的体积。技术上的困难相比,紧凑的情况下,绕过使用horosphere坐标和矩阵树定理。

英文摘要:

Invariant correlation functions for ${\rm SO}(1,N)$ hyperbolic sigma-models are investigated. The existence of a large $N$ asymptotic expansion is proven on finite lattices of dimension $d \geq 2$. The unique saddle point configuration is characterized by a negative gap vanishing at least like 1/V with the volume. Technical difficulties compared to the compact case are bypassed using horospherical coordinates and the matrix-tree theorem.

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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