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arXiv 1302.0906hep-phnucl-th
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热QCD物质的电导率

Electrical Conductivity of Hot QCD Matter

W. Cassing, O. Linnyk, T. Steinert, V. Ozvenchuk

摘要:

我们研究了热QCD物质在不同温度T下的电导率在离壳层部分子-强子-弦动力学输运方法中相互作用的部分子,强子或混合系统在有限的盒子与周期性边界条件。处于平衡状态的强相互作用系统对外部电场的响应定义了电导率σ_0。当Tc<T<2.5Tc时,我们发现σ_0/T比值与温度有相当大的关系,这与弛豫时间方法的计算结果一致。在强子阶段,该比值随T下降,在接近Tc时显示出最小值,并且在~ 5 Tc以上变得近似恒定(~0.3)。我们的研究结果表明,即使在T=Tc的QCD物质是一个更好的电导体比铜或银(在室温下)。

英文摘要:

We study the electric conductivity of hot QCD matter at various temperatures T within the off-shell parton-hadron-string dynamics transport approach for interacting partonic, hadronic or mixed systems in a finite box with periodic boundary conditions. The response of the strongly interacting system in equilibrium to an external electric field defines the electric conductivity sigma_0. We find a sizable temperature dependence of the ratio sigma_0/T well in line with calculations in a relaxation time approach for Tc<T<2.5Tc. The ratio drops in the hadronic phase with T, shows a minimum close to Tc, and becomes approximately constant (~0.3) above ~5Tc. Our findings imply that the QCD matter even at T=Tc is a much better electric conductor than Cu or Ag (at room temperature).

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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