445 research outputs found
Viscous Modified Cosmic Chaplygin Gas Cosmology
In this paper we construct modified cosmic Chaplygin gas which has viscosity.
We use exponential function method to solve non-linear equation and obtain
time-dependent dark energy density. Then discuss Hubble expansion parameter and
scale factor and fix them by using observational data. We also investigate
stability of this theory
Corrections Terms for the Thermodynamics of a Black Saturn
In this paper, we will analyze the effects of thermal fluctuations on the
stability of a black Saturn. The entropy of the black Saturn will get corrected
due to these thermal fluctuations. We will demonstrate that the correction term
generated by these thermal fluctuations is a logarithmic term. Then we will use
this corrected value of the entropy to obtain bounds for various parameters of
the black Saturn. We will also analyze the thermodynamical stability of the
black Saturn in presence of thermal fluctuations, using this corrected value of
the entropy.Comment: 15 pages, revised version has been accepted for publication in Phys.
Lett.
Effect of Thermal Fluctuations on a Charged Dilatonic Black Saturn
In this paper, we will analyze the effect of thermal fluctuations on the
thermodynamics of a charged dilatonic black Saturn. These thermal fluctuations
will correct the thermodynamics of the charged dilatonic black Saturn. We will
analyze the corrections to the thermodynamics of this system by first relating
the fluctuations in the entropy to the fluctuations in the energy. Then, we
will use the relation between entropy and a conformal field theory to analyze
the fluctuations in the entropy. We will demonstrate that similar physical
results are obtained from both these approaches. We will also study the effect
of thermal fluctuations on the phase transition in this charged dilatonic black
Saturn
The lower bound violation of shear viscosity to entropy ratio due to logarithmic correction in STU model
In this paper, we analyze the effects of thermal fluctuations on a STU black
hole. We observe that these thermal fluctuations can affect the stability of a
STU black hole. We will also analyze the effects of these thermal fluctuations
on the thermodynamic of STU black hole. Furthermore, in the Jacobson formalism
such a modification will produce a deformation of the geometry of the STU black
hole. Hence, we use the AdS/CFT correspondence to analyze the effect of such a
deformation on the dual quark-gluon plasma. So, we explicitly analyze the
effect of thermal fluctuations on the shear viscosity to entropy ratio in the
quark-gluon plasma, and analyze the effects of thermal fluctuations on this
ratio
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