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arXiv 2006.04265hep-thgr-qchep-ph
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有限耦合下一级QCD相变引力波的全息研究

Gravitational waves of a first-order QCD phase transition at finite coupling from holography

M. Ahmadvand, K. Bitaghsir Fadafan, S. Rezapour

摘要:

本文考虑了有限重化学势下宇宙一级QCD相变产生的耦合相关引力波的全息研究。在对偶描述中,一阶QCD相变对应于Gauss-Bonnet引力中的一阶Hawking-Page相变。在中等耦合下,我们得到了表征引力波能量密度谱的关键量。然后我们发现,引力波可以检测到足够大的高斯-邦纳耦合,而声波在频谱中起着重要的作用。我们还考虑了QCD相变期间的过冷情况,并表明在此期间产生的引力波可以通过脉冲星定时阵列实验检测到。

英文摘要:

We consider a holographic study of coupling dependent gravitational waves produced by the cosmic first order QCD phase transition at finite baryochemical potential. In the dual description, the first-order QCD phase transition corresponds to the first-order Hawking-Page phase transition in Gauss-Bonnet gravity. At intermediate coupling, we obtain key quantities characterizing the gravitational wave energy density spectrum. We then find that the gravitational waves might be detected for sufficiently large Gauss-Bonnet coupling, while sound waves play an important role in the spectrum. We also consider a supercooling scenario during the QCD phase transition and show that the gravitational waves generated during this period can be detected by pulsar timing array experiments.

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