Adiabatic decaying vacuum model for the universe
M. de Campos
TL;DR
This paper proposes an adiabatic decaying vacuum model for the universe, incorporating particle creation and a decaying lambda term, with solutions compatible with the universe's age and acceleration.
Contribution
It introduces an exact solution to Einstein's equations for a universe with constant entropy per particle, particle creation, and a decaying cosmological term.
Findings
Model aligns with observed universe age
Model explains cosmic acceleration
Exact solutions for Einstein's equations obtained
Abstract
We study a model that the entropy per particle in the universe is constant. The sources for the entropy are the particle creation and a lambda decaying term. We find exact solutions for the Einstein field equations and show the compatibilty of the model with respect to the age and the acceleration of the universe.
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