Qualitative aspects of Rastall gravity with barotropic fluid
Ashutosh Singh, Rakesh Raushan, R. Chaubey
Abstract
We investigate the dynamical evolution of a homogeneous and isotropic flat universe filled with a barotropic fluid satisfying the linear equation of state in Rastall gravity. Using the dynamical system approach, we determined the fixed points of the system and studied their stability. We further explore the thermodynamic aspects at the apparent horizon by investigating the validity of the generalised second law of thermodynamics with an equilibrium description.
Topics & Concepts
Barotropic fluidPhysicsIsotropyEquation of stateClassical mechanicsHomogeneousPerfect fluidThermodynamicsMechanicsQuantum mechanicsCosmology and Gravitation TheoriesBlack Holes and Theoretical PhysicsSolar and Space Plasma Dynamics