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Paper   IPM / Physic / 16163
School of Physics
  Title:   Gravitational waves of a first-order QCD phase transition at finite coupling from holography
  Author(s): 
1.  M. Ahmadvand
2.  K. Bitaghsir Fadafan
3.  S. Rezapour
  Status:   Preprint
  Journal:
  Year:  2020
  Supported by:  IPM
  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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