arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1609.04339hep-phnucl-th
收藏

关于有限密度下的高阶微扰计算

On high-order perturbative calculations at finite density

Ioan Ghisoiu, Tyler Gorda, Aleksi Kurkela, Paul Romatschke, Matias Säppi, Aleksi Vuorinen

摘要:

我们讨论的前景进行高阶微扰计算系统的特点是消失的温度,但有限的密度。特别是,我们表明,通用费曼积分包含费米子化学势的确定可以减少到三维相空间积分的真空壳振幅的评价-结果让人想起以前提出的“天真的实时形式主义”的真空图。这些规则的应用进行了讨论的背景下的热力学的冷和致密的QCD,有人认为,它们有利于扩展的状态方程的冷夸克物质到更高的微扰订单。

英文摘要:

We discuss the prospects of performing high-order perturbative calculations in systems characterized by a vanishing temperature but finite density. In particular, we show that the determination of generic Feynman integrals containing fermionic chemical potentials can be reduced to the evaluation of three-dimensional phase space integrals over vacuum on-shell amplitudes - a result reminiscent of a previously proposed "naive real-time formalism" for vacuum diagrams. Applications of these rules are discussed in the context of the thermodynamics of cold and dense QCD, where it is argued that they facilitate an extension of the Equation of State of cold quark matter to higher perturbative orders.

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。

↑