91 citations · 594 across the 24 of their papers we have counts for
24 papers
Non-perturbative correction to thermodynamics of conformally dressed 3D black hole
Saheb Soroushfar, Hoda Farahani, Sudhaker Upadhyay
We extend the study of corrected thermodynamics for the 3D black holes conformally coupled to scalar field up to non-perturbative level. We calculate the exponential correction to…
Sound Speed in Extended Chaplygin Fluid
Behnam Pourhassan, Hoda Farahani, Sudhaker Upadhyay
We consider an extended Chaplygin gas equation of state which is driven from D-brane action and construct a cosmological model based on this equation of state. In this regard, we c…
Quantum gravity effects on Hořava-Lifshitz black hole
B. Pourhassan, S. Upadhyay, H. Saadat +1
In this paper, we would like to obtain quantum gravity effects by using Hořava-Lifshitz black hole. We consider logarithmic corrected thermodynamics quantities and investigate the…
P-V criticality of first-order entropy corrected AdS black holes in massive gravity
S. Upadhyay, B. Pourhassan, H. Farahani
We consider a massive black hole in four dimensional AdS space and study the effect of thermal fluctuations on the thermodynamics of the black hole. We consider thermal fluctuation…
Thermodynamics of Higher Order Entropy Corrected Schwarzschild-Beltrami-de Sitter Black Hole
Behnam Pourhassan, Hoda Farahani, Sudhaker Upadhyay
In this paper, we consider higher order correction of the entropy and study the thermodynamical properties of recently proposed Schwarzschild-Beltrami-de Sitter black hole, which i…
Logarithmic corrected gravity in the light of Planck 2015
J. Sadeghi, H. Farahani
In this letter, we consider the theory of gravity with the lagrangian density . We obtain the constant curvature solutions and find the scalar pot…
Interacting Holographic Extended Chaplygin Gas and Phantom Cosmology in the Light of BICEP2
J. Sadeghi, H. Farahani, B. Pourhassan
In this paper, we study the holographic dark energy density and interacting extended Chaplygin gas energy density in the Einstein gravity. We reconstruct the scalar field and the s…
Dark Energy and Tachyon Field in Bianchi Type-V Space-time
J. Sadeghi, H. Farahani
In this paper, we consider Bianchi type-V space-time and study a cosmological model of dark energy based on Tachyon scalar field. We assumed three different kinds of matter without…
Interacting quintessence dark energy models in Lyra manifold
M. Khurshudyan, J. Sadeghi, R. Myrzakulov +2
In this paper, we consider two-component dark energy models in Lyra manifold. The first component is assumed as a quintessence field while the second model may be a viscous polytro…
Interacting Ricci dark energy models with an effective -term in Lyra manifold
M. Khurshudyan, J. Sadeghi, A. Pasqua +3
In this paper we consider a universe filled with barotropic dark matter and Ricci dark energy in Lyra geometry with varying Lambda. We assume two different kinds of interactions be…
Interaction between modified Chaplygin gas and ghost dark energy in presence of extra dimensions
M. Khurshudyan, J. Sadeghi, M. Hakobyan +2
In this paper, we consider three different models of dark energy in higher dimensional space-time and discuss about some cosmological parameters numerically. The first model is a s…
Quintessence Cosmology with an Effective -Term in Lyra Manifold
M. Khurshudyan, A. Pasqua, J. Sadeghi +1
In this paper, we study quintessence cosmology with an effective -term in Lyra manifold. We consider three different models by choosing variable depend on time, the Hubble p…
Interacting Ghost Dark Energy Models in the Higher Dimensional Cosmology
J. Sadeghi, M. Khurshudyan, H. Farahani
We investigate interacting ghost dark energy models in higher dimensional cosmology. We attempt to model dark matter within a barotropic fluid with . In this work…
Phenomenologically varying and a toy model for the Universe
M. Khurshudyan, J. Sadeghi, E. Chubaryan +1
We consider a model of the Universe with variable G and Λ. Subject of our interest is a phenomenological model for Λ proposed and considered in this article first time (up to our k…
Rotating charged hairy black hole in (2+1) dimensions and particle acceleration
J. Sadeghi, B. Pourhassan, H. Farahani
In this paper we construct rotating charged hairy black hole in (2+1) dimensions for infinitesimal black hole charge and rotation parameters. Then we consider this black hole as pa…
Hubble parameter corrected interactions in cosmology
J. Sadeghi, M. Khurshudyan, M. Hakobyan +1
In this paper we make steps in a new direction by considering fluids with EoS of more general form . It is thought that there should be interaction between cosmic fluids,…
Mutually interacting Tachyon dark energy with variable and
J. Sadeghi, M. Khurshudyan, M. Hakobyan +1
In this paper we consider Tachyonic scalar field as dark energy with interaction between components in the case of variable and . We assume a flat Universe with specific for…
Phenomenological Fluids from Interacting Tachyonic Scalar Fields
J. Sadeghi, M. Khurshudyan, M. Hakobyan +1
In this paper we are interested to consider mathematical ways to obtain different phenomenological fluids from two-component Tachyonic scalar fields. We consider interaction betwee…
Interacting Ghost Dark Energy Models with Variable and
J. Sadeghi, M. Khurshudyan, A. Movsisyan +1
In this paper we consider several phenomenological models of variable . Model of a flat Universe with variable and is accepted. It is well known, that varying and $Λ…
Phenomenological Varying Modified Chaplygin Gas with Variable and : Toy Models for Our Universe
J. Sadeghi, M. Khurshudyan, H. Farahani
This article motivated by the recent articles and results of two authors. Recently, J. Sadeghi and H. Farahani presented a work [1], where they include viscosity and analyze genera…
Thermodynamics of a charged hairy black hole in (2+1) dimensions
J. Sadeghi, H. Farahani
In this paper we study thermodynamics, statistics and spectroscopic aspects of a charged black hole with a scalar hair coupled to the gravity in (2+1) dimensions. We obtained effec…
Interaction between viscous varying modified cosmic Chaplygin gas and Tachyonic fluid
Jafar Sadeghi, Hoda Farahani
In this paper we study the interaction between the general form of viscous varying modified cosmic Chaplygin gas and the Tachyon fluid in the framework of Einstein gravity. We want…
Thermodynamical Stability of Hagedorn and Radiation Regimes in Closed String Gas Cosmology
J. Sadeghi, H. Farahani, B. Pourhassan
In this paper, we investigate thermal equilibrium in string gas cosmology which is dominated by closed string.We consider two interesting regimes, Hagedorn and radiation regimes.We…
Cosmic String in the BTZ Black Hole Background with Time-Dependant Tension
J. Sadeghi, H. M. Farahani, B. Pourhassan +1
In this paper, we study the equation of circular loops with time-dependant tension in the BTZ black hole background. We obtain various cases where cosmic string loops finally colla…