August 4th-7th, 2014
Yukawa Institute for Theoretical Physics, Kyoto University
"Entropic-force cosmological models for a generalized black-hole entropy"
Nobuyoshi Komatsu (Kanazawa University)
An entropic-force scenario, i.e., entropic cosmology, assumes that the horizon of the Universe
has an entropy and a temperature due to the information holographically stored there.
In this study, we derive entropic-force terms not only from the Bekenstein entropy
but also from a generalized black-hole entropy proposed by Tsallis and Cirto [Eur. Phys. J. C 73, 2487 (2013)].
The entropic-force term derived from the generalized entropy is found to behave
as if it were an extra driving term for bulk viscous cosmology,
in which a bulk viscosity of cosmological fluids is assumed.
[N. Komatsu and S. Kimura, Phys. Rev. D 88, 083534 (2013)]
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