Emergent cosmic space in Rastall theory

Understand

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.