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arXiv 2011.12878hep-thastro-ph.COgr-qchep-ph
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全息相变产生的引力波

Gravitational waves from a holographic phase transition

Fëanor Reuben Ares, Mark Hindmarsh, Carlos Hoyos, Niko Jokela

摘要:

研究了五维爱因斯坦引力场与标量场耦合的全息背景下的一级相变,构造了有限温度下的对偶场论相图。我们扫描了一个简单的自下而上模型的二维参数空间,并绘制出相变的重要量:一阶相变发生的区域;潜热,转变强度参数$α$和刚度。我们发现,$α$一般是在0.1至0.3的范围内,并强烈相关的刚度(正压流体中的声速的平方)。利用LISA宇宙学工作组的引力波功率谱模型,在大尺度$α$和非共形刚度下进行动能抑制修正,我们对未来空间探测器LISA和天琴的观测前景进行了展望。在两个探测器上都可以观察到TeV级的隐藏扇区,该扇区具有由模型描述的相变。

英文摘要:

We investigate first order phase transitions in a holographic setting of five-dimensional Einstein gravity coupled to a scalar field, constructing phase diagrams of the dual field theory at finite temperature. We scan over the two-dimensional parameter space of a simple bottom-up model and map out important quantities for the phase transition: the region where first order phase transitions take place; the latent heat, the transition strength parameter $α$, and the stiffness. We find that $α$ is generically in the range 0.1 to 0.3, and is strongly correlated with the stiffness (the square of the sound speed in a barotropic fluid). Using the LISA Cosmology Working Group gravitational wave power spectrum model corrected for kinetic energy suppression at large $α$ and non-conformal stiffness, we outline the observational prospects at the future space-based detectors LISA and TianQin. A TeV-scale hidden sector with a phase transition described by the model could be observable at both detectors.

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