2021/01/07 by Mohamed Moussa, Homa Shababi, Ahmed Farag Ali
Physics and Astronomy · #Astronomy #Classical mechanics #Cosmology and Gravitation Theories #Gravitational wave #Gravitational wave background #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Radio Astronomy Observations and Technology #Spectrum (functional analysis) #Statistical physics #Theoretical physics #Uncertainty principle #astro-ph.HE #gr-qc #hep-th
paper · pdf · doi:10.1016/j.physletb.2021.136071
published as Phys.Lett. B814 (2021) 136071 · 10 pages, 7 figures, revtex4, to appear in Physics Letters B
arxiv created 2021/01/07 · openalex publication_date 2021/01/15 · openalex created_date 2021/01/18 · arxiv updated 2021/01/22 · openalex updated_date 2026/08/05
This paper concerned with the effect of generalized uncertainty principle (GUP) on the stochastic gravitational wave (SGW) background signal that produced during first order cosmological QCD phase transition in early universe. A modified formula of entropy is used to calculate the temporal evolution of temperature of the universe as a function of the Hubble parameter. The pressure that results from the recent lattice calculations, which provides parameterizations of the pressure due to u,d,s quarks and gluons, with trace anomaly is used to describe the equation of state around QCD epoch. A redshift in the peak frequency of SGW at current epoch is calculated. The results indicate an increase in the frequency peak due to GUP effect, which improves the ability to detect it. Taking into account bubble wall collisions (BWC) and turbulent magnetohydrodynamics (MHD) as a source of SGW, a fractional energy density is investigated. It is found that the GUP effect weakens the SGW signal generated during QCD phase transition in comparison to its counterpart in the absence of GUP. These results support understanding the cosmological QCD phase transition and test the effectiveness of the GUP theory.