论文标题
来自全息相变的重力波
Gravitational waves from a holographic phase transition
论文作者
论文摘要
我们在五维爱因斯坦重力耦合到标量场的全息环境中研究了一级相变，在有限温度下构建了双场理论的相图。我们在简单的自下而上模型的二维参数空间上进行扫描，并绘制出相变的重要数量：发生一阶相变的区域；潜热，过渡强度参数$α$和刚度。我们发现$α$通常在0.1至0.3范围内，并且与刚度（正压流体中的声速平方）密切相关。使用LISA宇宙工作组引力波谱模型校正了大于$α$的动能抑制和非统一刚度，我们概述了未来空间基探测器Lisa和Tianqin的观察前景。在两个检测器上都可以观察到具有模型描述的相变的TEV规模的隐藏扇区。
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.
