Emergent cosmic space in Rastall theory

Abstract

Padmanabhan's emergent cosmic space proposal is employed to study the Rastall theory which involves modifying the conservation law of energy-momentum tensor. As a necessary element for this approach, we firstly propose a modified Komar energy which reflects the evolution of the energy-momentum itself in the case of a perfect fluid. After that, an expansion law is invoked to reobtain the Friedmann equation in this theory.

8 pages, no figures, published version in CQG

References in corpus (11)

• Hawking Radiation of Apparent Horizon in a FRW Universe
• Emergent Gravity Paradigm: Recent Progress
• Friedmann equations from emergence of cosmic space
• The Brans-Dicke-Rastall theory
• Emergence of Cosmic Space and the Generalized Holographic Equipartition
• Emergence of Space and Spacetime Dynamics of Friedmann-Robertson-Walker Universe
• Emergence and Expansion of Cosmic Space as due to the Quest for Holographic Equipartition
• Geometrical variables with direct thermodynamic significance in Lanczos-Lovelock gravity
• Emergence and Expansion of Cosmic Space in BIonic system
• Abelian-Higgs strings in Rastall gravity
• Thermodynamic approach to field equations in Lovelock gravity and f(R) gravity revisited

Cited by in corpus (7)

• Einstein and Rastall Theories of Gravitation in Comparison
• Accelerated cosmos in a non-extensive setup
• The commutator algebra of covariant derivative as general framework for extended gravity. The Rastall theory case and the role of the torsion
• Cosmic evolution of dark energy in a generalized Rastall gravity
• A dynamical system representation of generalized Rastall gravity
• Emergence of fractal cosmic space from fractional quantum gravity
• Matter perturbations in Einstein dark energy model