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arXiv 1707.00521hep-thastro-ph.HEnucl-th
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强耦合规范理论中的刚性相

Stiff phases in strongly coupled gauge theories with holographic duals

Christian Ecker, Carlos Hoyos, Niko Jokela, David Rodríguez Fernández, Aleksi Vuorinen

摘要:

根据通常的知识,具有引力场的场论的状态方程往往是软的,声速低于或接近$v_s=1/\sqrt{3}$的共形值。这对致密星的物理学有着重要的影响,在致密星中,探测两颗太阳质量的中子星需要非常严格的状态方程。在本文中,我们表明,没有速度限制存在于有限密度的全息模型,明确构建的例子,其中的声速变得任意接近的光。这开启了建造混合恒星的可能性,这些恒星的核心包含服从全息状态方程的夸克物质。

英文摘要:

According to common lore, Equations of State of field theories with gravity duals tend to be soft, with speeds of sound either below or around the conformal value of $v_s=1/\sqrt{3}$. This has important consequences in particular for the physics of compact stars, where the detection of two solar mass neutron stars has been shown to require very stiff equations of state. In this paper, we show that no speed limit exists for holographic models at finite density, explicitly constructing examples where the speed of sound becomes arbitrarily close to that of light. This opens up the possibility of building hybrid stars that contain quark matter obeying a holographic equation of state in their cores.

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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