PROBLEMS AND CURES (PARTIAL) FOR HOLOGRAPHIC COSMOLOGY

M. A. PER, A. SEGUI
2004 String Phenomenology 2003  
We analyze the validity of the generalized covariant entropy bound near the apparent horizon of isotropic expanding cosmological models. We encounter violations of the bound for cosmic times smaller than a threshold. By introducing an infrared cutoff we are able to mantain the bound for a radiation dominated universe. We study different physical mechanisms to restore the bound, as a non-additivity of the entropy at a fundamental level and/or a cosmological uncertainty relation.
doi:10.1142/9789812702463_0039 fatcat:24m52sw2svgazfp5ut54vvoglm