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arXiv 0807.3463hep-lathep-phhep-thphysics.comp-ph
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五维U(1)格点规范模型中沿额外维的有限温度和禁闭

Finite temperature and confinement along the extra dimensions studied on a five-dimensional U(1) lattice gauge model

K. Farakos, S. Vrentzos

摘要:

本文研究了有限温度下晶格上简单额外维模型的相图性质。考虑具有各向异性耦合的五维纯规范阿贝尔模型,它在零温下呈现出一个新的有趣相,即层相。这个阶段的特点是一个无质量的光子生活在四维子空间和限制沿额外的维度。我们表明,只要温度采取非零值的上述层相消失。这将等同于假设在有限温度下,由于在有限温度下打开三维子空间之间的相互作用的去限制,高维晶格模型失去了分层结构的任何特征。

英文摘要:

In this paper we study the properties of the phase diagram of a simple extra dimensional model on the lattice at finite temperature. We consider the five-dimensional pure gauge abelian model with anisotropic couplings which at zero temperature exhibits a new interesting phase, the layer phase. This phase is characterized by a massless photon living on the four dimensional subspace and confinement along the extra dimension. We show that, as long as the temperature takes a non zero value the aforementioned layer phase disappears. It would be equivalent to assume that at finite temperature the higher-dimensional lattice model loses any feature of the layered structure due to the deconfinement which opens up the interactions between the three-dimensional subspaces at finite temperature.

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