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arXiv 1602.04048math-phmath.MPmath.PR
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4D旋转模型和自我回避行走的重新正常化组分析

Renormalisation group analysis of 4D spin models and self-avoiding walk

Roland Bauerschmidt, David C. Brydges, Gordon Slade

摘要:

我们给出了一个概述的结果在4维的临界现象,最近获得的使用严格的重整化群方法。特别是,对于$n$组件$|φ|^4$自旋模型在4维,具有小的耦合常数,我们证明了磁化率发散与指数$(n+2)/(n+8)$的平均场行为的对数校正。这一结果严格地扩展到$n=0$,解释为一个超对称版本的模型,表示正是连续时间弱自回避行走。我们还分析了弱自回避行走的临界两点函数、$|φ|^4$模型的比热和压力以及临界点附近自旋场的标度极限。

英文摘要:

We give an overview of results on critical phenomena in 4 dimensions, obtained recently using a rigorous renormalisation group method. In particular, for the $n$-component $|φ|^4$ spin model in dimension 4, with small coupling constant, we prove that the susceptibility diverges with a logarithmic correction to the mean-field behaviour with exponent $(n+2)/(n+8)$. This result extends rigorously to $n=0$, interpreted as a supersymmetric version of the model that represents exactly the continuous-time weakly self-avoiding walk. We also analyse the critical two-point function of the weakly self-avoiding walk, the specific heat and pressure of the $|φ|^4$ model, as well as scaling limits of the spin field close to the critical point.

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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