Speed of light in the extended gravity theories

Abstract

We shall investigate the possibility of formulation of varying speed of light (VSL) in the framework of Palatini non-linear Ricci scalar and Ricci squared theories. Different speeds of light including the causal structure constant, electromagnetic, and gravitational wave speeds are discussed. We shall see that two local frames are distinguishable and discuss about the velocity of light in these two frames. We shall investigate which one of these local frames is inertial.

19 pages. to appear in Classical Quantum Gravity

References in corpus (6)

• Dynamics of dark energy
• Avoiding Dark Energy with 1/R Modifications of Gravity
• Metric-affine f(R) theories of gravity
• The Cosmology of Ricci-Tensor-Squared Gravity in the Palatini Variational Approach
• Note on Varying Speed of Light Cosmologies
• Geodesic Congruences in the Palatini f(R) Theory

Cited by in corpus (6)

• Palatini Approach to Modified Gravity: f(R) Theories and Beyond
• The minimally extended Varying Speed of Light (meVSL)
• Observational effects of varying speed of light in quadratic gravity cosmological models
• Studying the Supernova luminosity distance in Palatini formalism considering the role of causal structure constant
• On the Quantum Improved Affine Gravity
• Cosmological solutions of Tensor-Vector theories of gravity with varying the space-time-matter coupling constant