Speaker
Dr
Fazlollah Hajkarim
(Goethe University Frankfurt)
Description
Using the quantum chromodynamics (QCD) equation of state (EoS) from lattice calculations we investigate effects from QCD on primordial gravitational waves (PGWs) produced during the inflationary era. We also consider different cases for vanishing and nonvanishing lepton asymmetry where the latter one is constrained by cosmic microwave background experiments.
Also, we investigate scenarios that inflation is succeeded by a phase where the energy density of the Universe was dominated by a component with a general equation of state, we evaluate the spectrum of primordial gravitational waves induced in the post-inflationary Universe.
We show that if the energy density of the Universe was dominated by some specific fluid 𝜙 before Big Bang Nucleosynthesis (BBN), its equation of state could be constrained by gravitational wave experiments.
Primary author
Dr
Fazlollah Hajkarim
(Goethe University Frankfurt)
