262 research outputs found
Generalized Bekenstein-Hawking system: Logarithmic Correction
The present work is a generalization of the recent work [arXiv: 1206.1420] on
the modified Hawking temperature on the event horizon. Here the Hawking
temperature is generalized by multiplying the modified Hawking temperature by a
variable parameter \alpha representing the ratio of the growth rate of the
apparent horizon to the event horizon. It is found that both the first and the
generalized second law of thermodynamics are valid on the event horizon for any
fluid distribution. Subsequently, Bekenstein entropy is modified on the event
horizon and thermodynamical laws are examined. Finally, interpretation of the
parameters involved has been presented.Comment: 10 page
Is Emergent Universe a Consequence of Particle Creation Process?
A model of an emergent universe is formulated using the mechanism of particle
creation. Here the universe is considered as a non-equilibrium thermodynamical
system with dissipation due to particle creation mechanism. The universe is
chosen as spatially flat FRW space-time and the cosmic substratum is chosen as
perfect fluid with barotropic equation of state. Both first and second order
deviations from equilibrium prescription is considered and it is found that the
scenario of emergent universe is possible in both the cases.Comment: 6 pages, Accepted for Publication in Physics Letters
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