scholarly journals The effect of bulk dimension in the presence of string cloud on viscosity bound

2020 ◽  
pp. 2050330
Author(s):  
Mehdi Sadeghi
Keyword(s):  
Shear Viscosity ◽  
Dirichlet Boundary ◽  
Massive Gravity ◽  
Entropy Density ◽  
Black Brane ◽  
Black Brane Solution ◽  
Brane Solution ◽  
Arbitrary Dimensions

In this paper, the Einstein AdS black brane solution in the presence of a string cloud in the context of d-dimensional massive gravity is introduced. The ratio of shear viscosity to entropy density for this solution violates the KSS bound by applying the Dirichlet boundary and regularity on the horizon conditions. Our result shows that this value is independent of string cloud in any arbitrary dimensions.

scholarly journals AdS black brane solution surrounded by quintessence in massive gravity and KSS bound

2021 ◽  
pp. 2150202
Author(s):  
Mehdi Sadeghi
Keyword(s):  
Shear Viscosity ◽  
Dirichlet Boundary ◽  
Massive Gravity ◽  
Entropy Density ◽  
Regularity Conditions ◽  
Black Brane ◽  
Black Brane Solution ◽  
Brane Solution ◽  
Arbitrary Dimensions

In this paper, the Einstein AdS black brane solution in the presence of quintessence in context of massive gravity is introduced. The ratio of shear viscosity to entropy density for this solution violates the KSS bound by applying the Dirichlet boundary and regularity conditions on the horizon for [Formula: see text]. Our result shows that this value is independent of quintessence in any arbitrary dimensions.

scholarly journals Black brane solution in Rastall AdS massive gravity and viscosity bound

2018 ◽  
Vol 33 (37) ◽  
pp. 1850220 ◽  
Author(s):  
Mehdi Sadeghi
Keyword(s):  
Shear Viscosity ◽  
Massive Gravity ◽  
Entropy Density ◽  
Black Brane ◽  
Black Brane Solution ◽  
Brane Solution

In this paper, we introduced the black brane solution in Rastall theory and in the context of massive gravity. The ratio of shear viscosity to entropy density is calculated for this solution. Our result shows that the KSS bound violates this theory.

scholarly journals Black-brane solution for A3 algebra

2002 ◽  
Vol 543 (1-2) ◽  
pp. 98-106 ◽  
Author(s):  
M.A. Grebeniuk ◽  
V.D. Ivashchuk ◽  
V.N. Melnikov
Keyword(s):  
Black Brane ◽  
Black Brane Solution ◽  
Brane Solution

scholarly journals Black-brane solution for C2 algebra

2002 ◽  
Vol 43 (12) ◽  
pp. 6016-6023 ◽  
Author(s):  
M. A. Grebeniuk ◽  
V. D. Ivashchuk ◽  
S.-W. Kim
Keyword(s):  
Black Brane ◽  
Black Brane Solution ◽  
Brane Solution

THE FLUID–GRAVITY CORRESPONDENCE: THE MEMBRANE AT THE END OF THE UNIVERSE

2008 ◽  
Vol 17 (13n14) ◽  
pp. 2571-2576 ◽  
Author(s):  
VERONIKA E. HUBENY ◽  
MUKUND RANGAMANI ◽  
SHIRAZ MINWALLA ◽  
MARK VAN RAAMSDONK
Keyword(s):  
Fluid Dynamics ◽  
Black Holes ◽  
Lower Dimension ◽  
Black Brane ◽  
Entire Space ◽  
Dynamical Equations ◽  
Black Brane Solution ◽  
Brane Solution ◽  
Regular Event ◽  
The Universe

We establish an explicit connection between the evolution of generic inhomogeneous black brane solutions in asymptotically AdS space–times and the evolution of relativistic conformal fluids in one lower dimension. Specifically, given any solution to a particular set of fluid-dynamical equations, one can construct an inhomogeneous black brane solution with a regular event horizon. This connection is reminiscent of the membrane paradigm for black holes; in our case the dynamics of the entire space–time is encoded in a fluid living at the boundary. This fluid–gravity correspondence leads to interesting implications for both gravitational physics and fluid dynamics.

scholarly journals Hydrodynamics in a black brane with hyperscaling violation metric background

2014 ◽  
Vol 92 (12) ◽  
pp. 1570-1572 ◽  
Author(s):  
J. Sadeghi ◽  
A. Asadi
Keyword(s):  
Shear Viscosity ◽  
Entropy Density ◽  
Point Of View ◽  
Black Brane ◽  
Hyperscaling Violation

In this paper we consider a metric with hyperscaling violation on a black brane background. In this background we calculate the ratio of shear viscosity to entropy density with hydrodynamics information. The calculation of this quantity leads us to a constraint on θ as 3 ≤ θ < 4, and θ ≤ 0. In that case we show that the quantity η/s is not dependent on hyperscaling violation parameter θ. Our results about ratio of shear viscosity to entropy density from the QCD point of view agree with other works in the literature as 1/4π.

scholarly journals Shear viscosity to entropy density ratio of Hagedorn states

2020 ◽  
Vol 102 (3) ◽  
Author(s):  
Jan Rais ◽  
Kai Gallmeister ◽  
Carsten Greiner
Keyword(s):  
Shear Viscosity ◽  
Density Ratio ◽  
Entropy Density
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