Entropy bounds and nonlinear electrodynamics

Bekenstein's inequality sets a bound on the entropy of a charged macroscopic body. Such a bound is understood as a universal relation between physical quantities and fundamental constants of nature that should be valid for any physical system. We reanalyze the steps that lead to this entropy bound considering a charged object in conformity to Born-Infeld electrodynamics and show that the bound depends on the underlying theory used to describe the physical system. Our result shows that the nonlinear contribution to the electrostatic self-energy causes a rise in the entropy bound. As an intermediate step to obtain this result, we exhibit a general way to calculate the form of the electric field for given nonlinear electrodynamics in Schwarzschild spacetime.