Entropy bounds, Geroch process, and the sign of deformation parameter

Based on Geroch's process of dropping a system into a black hole from the vicinity of the horizon, we investigate in this paper the influence of deformation on the Bekenstein entropy bound both for (3+1) and (2+1) dimensions in the context of a generalized uncertainty principle (GUP).

While providing a coherent framework for providing an upper limit on the entropy across dimensions we show, in the framework of a semiclassical treatment, that while a negative GUP deformation yields a universal relaxation of the bound, a positive deformation tightens it.

Our results may be interpreted as a response to Planck-scale modifications of the near-horizon redshift.