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Nonlocal extension of causal thermodynamics of the isotropic cosmic fluid
- Source :
- Physics Letters, Physics Letters B, Vol 826, Iss, Pp 136912-(2022)
- Publication Year :
- 2022
- Publisher :
- Elsevier BV, 2022.
-
Abstract
- We establish the nonlocal generalization of the Israel-Stewart model for the relativistic causal thermodynamics of the cosmic fluid, which evolves in the homogeneous isotropic Universe. Based on the second law of thermodynamics we derive the integro-differential master equation for the nonequilibrium pressure scalar and reduce it to the differential equation of the second order in time derivatives. We show that this master equation can be considered as the relativistic analog of the Burgers equation, which is known in the classical theory of viscoelasticity. We obtain the nonlinear key equation, which contains the energy density scalar only, and analyze two exact solutions of the model. The effective temperature is considered to be associated with the barotropic equation of state of the cosmic fluid.<br />10 pages, 2 figures, revised version published in Phys.Lett.B
- Subjects :
- Nuclear and High Energy Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Physics
QC1-999
FOS: Physical sciences
Nonlocal interactions
General Relativity and Quantum Cosmology (gr-qc)
Causal thermodynamics
General Relativity and Quantum Cosmology
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- ISSN :
- 03702693
- Volume :
- 826
- Database :
- OpenAIRE
- Journal :
- Physics Letters B
- Accession number :
- edsair.doi.dedup.....9e3e0ec567af24ceb12ed4f2d2884b48