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arXiv 1208.6472hep-lathep-ph
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作为表面和环的规范场和物质场--Z(3)规范-希格斯模型的探索性格点研究

Gauge and matter fields as surfaces and loops - an exploratory lattice study of the Z(3) Gauge-Higgs model

Christof Gattringer, Alexander Schmidt

摘要:

本文讨论了有限密度下Z(3)规范-希格斯格点场论的对偶变量表示,通量和表面的循环。在对偶表示中,传统公式的复杂作用问题得到解决,并在任意化学势下的蒙特卡罗模拟成为可能。介绍了一种基于元胞占据数和链通量的算法,并对零温有限密度下的弱耦合和强耦合模型进行了分析。我们表明,在零温度下,该模型具有不同的一级相变作为化学势的函数的弱和强耦合相。探索性研究表明,替代自由度可以成功地用于蒙特卡罗模拟在几个系统的规范和物质领域。

英文摘要:

We discuss a representation of the Z(3) Gauge-Higgs lattice field theory at finite density in terms of dual variables, i.e., loops of flux and surfaces. In the dual representation the complex action problem of the conventional formulation is resolved and Monte Carlo simulations at arbitrary chemical potential become possible. A suitable algorithm based on plaquette occupation numbers and link-fluxes is introduced and we analyze the model at zero temperature and finite density both in the weak and strong coupling phases. We show that at zero temperature the model has different first order phase transitions as a function of the chemical potential both for the weak and strong coupling phases. The exploratory study demonstrates that alternative degrees of freedom may successfully be used for Monte Carlo simulations in several systems with gauge and matter fields.

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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