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arXiv · 1311.4017

A thermodynamically consistent quasi-particle model without density-dependent infinity of the vacuum zero point energy

Liu-jun Luo·Jing Cao·Yan Yan·Wei-Min Sun·Hong-Shi Zong
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Abstract

In this paper, we generalize the improved quasi-particle model proposed in J. Cao et al., [ Phys. Lett. B {\bf711}, 65 (2012)] from finite temperature and zero chemical potential to the case of finite chemical potential and zero temperature, and calculate the equation of state (EOS) for (2+1) flavor Quantum Chromodynamics (QCD) at zero temperature and high density. We first calculate the partition function at finite temperature and chemical potential, then go to the limit $T=0$ and obtain the equation of state (EOS) for cold and dense QCD, which is important for the study of neutron stars. Furthermore, we use this EOS to calculate the quark-number density, the energy density, the quark-number susceptibility and the speed of sound at zero temperature and finite chemical potential and compare our results with the corresponding ones in the existing literature.

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Liu-jun Luo, Jing Cao, Yan Yan, Wei-Min Sun, Hong-Shi Zong. 2013-11-19. A thermodynamically consistent quasi-particle model without density-dependent infinity of the vacuum zero point energy. https://doi.org/10.1140/epjc%2Fs10052-013-2626-0

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