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arXiv · 2006.04265

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

M. Ahmadvand·K. Bitaghsir Fadafan·S. Rezapour
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Abstract

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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M. Ahmadvand, K. Bitaghsir Fadafan, S. Rezapour. 2020-06-07. Gravitational waves of a first-order QCD phase transition at finite coupling from holography. https://arxiv.org/abs/2006.04265

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