arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0911.0116math-phmath.MP
收藏

无限温度下重整化群的光谱性质

Spectral properties of the renormalization group at infinite temperature

Mei Yin

摘要:

重整化群(RG)的方法在很大程度上是负责相当大的成功,已取得了发展的定量理论的相变。物理性质出现在一个固定点的RG映射的线性化的光谱特性。本文考虑了经典Ising型格点系统的RG。线性化作用于相互作用的无限维Banach空间。在一个平凡的不动点(零相互作用),RG线性化的谱性质可以明确地计算出来,没有任何近似。结果是对应于抽选和多数规则的RG映射。它们表明谱的一个不寻常的种类:密集点谱的伴随算子没有点谱,只有剩余谱。这可以作为一个教训,人们可能会期望在更一般的情况下。

英文摘要:

The renormalization group (RG) approach is largely responsible for the considerable success that has been achieved in developing a quantitative theory of phase transitions. Physical properties emerge from spectral properties of the linearization of the RG map at a fixed point. This article considers RG for classical Ising-type lattice systems. The linearization acts on an infinite-dimensional Banach space of interactions. At a trivial fixed point (zero interaction), the spectral properties of the RG linearization can be worked out explicitly, without any approximation. The results are for the RG maps corresponding to decimation and majority rule. They indicate spectrum of an unusual kind: dense point spectrum for which the adjoint operators have no point spectrum at all, only residual spectrum. This may serve as a lesson in what one might expect in more general situations.

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。

↑