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arXiv 2012.04991hep-ph
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夸克凝聚的热力学

Thermodynamics from the quark condensate

Philipp Isserstedt, Christian S. Fischer, Thorsten Steinert

摘要:

我们提出了一种方法来计算热力学量的功能连续框架内,是独立的截断。作为原理的证明,我们首先将其应用于平均场近似下的Nambu-Jona-Lasinio模型。然后,我们利用在Landau规范下的(2+1)味量子色动力学的夸克和胶子传播子的截断Dyson-Schwinger方程组的耦合解,得到了强相互作用物质相图上的压强、熵密度、能量密度和相互作用测度.我们还讨论了所提出的方法的局限性。

英文摘要:

We present a method to compute thermodynamic quantities within functional continuum frameworks that is independent of the employed truncation. As a proof of principle, we first apply it to a Nambu-Jona-Lasinio model in mean-field approximation. Then, we use the method with solutions obtained from a coupled set of truncated Dyson-Schwinger equations for the quark and gluon propagators of (2+1)-flavor quantum chromodynamics in Landau gauge to obtain the pressure, entropy density, energy density, and interaction measure across the phase diagram of strong-interaction matter. We also discuss the limitation of the proposed method.

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