Description
Different approaches to quantum gravity predict logarithmic corrections to the Bekenstein entropy. Generalizing Jacobson’s derivation of the gravitational field equations from spacetime thermodynamics, Alonso-Serrano and Liška have derived effective dynamics incorporating quantum gravity corrections. The resulting field equations are traceless, as in unimodular gravity, and feature a single free parameter which controls deviations from general relativity. We analyze the evolution of the cosmological background and primordial perturbations in this model, and discuss theoretical constraints.