95 citations · 347 across the 34 of their papers we have counts for
40 papers
Brans Dicke scalar-tensor gravity and unimodular FRW cosmology with Coleman-Weinberg potential
Manda Malekpour, Hossein Ghaffarnejad
As alternative gravity theories with respect to the general relativity, the Brans-Dicke (BD) scalar tensor model is well known for which the BD parameter is controller the best fit…
Stabilization of spherically symmetric static Boson stars by Coleman-Weinberg self-interaction potential
Firoozeh Eidizade, Hossein Ghaffarnejad
Our motivation in this work is due to the great importance of relativistic boson stars as fierce competitors of black holes. From theoretical perspective, they described by complex…
Canonical quantization of modified non-gauge invariant Einstein-Maxwell gravity and stability of spherically symmetric electrostatic stars
Hossein Ghaffarnejad
We consider a non-minimally coupled Einstein-Maxwell gravity with no symmetry property to study stability of an electrostatic star via canonical quantization approach and ob…
Thermodynamic phase transition of Anti-de Sitter Reissner-Nordström black holes with exotic Einstein-Maxwell gravities
Hossein Ghaffarnejad, Elham Ghasemi
To consider the inevitable cosmic magnetic effects instead of the unknown dark sector of matter/energy on the inflation phase of the expanding universe some authors have proposed s…
On the stability of electrostatics stars with modified non-gauge invariant Einstein-Maxwell gravity
Hossein Ghaffarnejad, Tohid Ghorbani, Firoozeh Eidizadeh
We use a modified Einstein-Maxwell gravity to study stability of an electrostatic spherical star. Correction terms in this model are scalers which are made from contraction of Ricc…
Modified Gauge Invariant Einstein Maxwell Gravity and Stability of Spherical perfect fluid Stars with Magnetic Monopoles
Hossein Ghaffarnejad, Leyla Naderi
As an alternative gravity model we consider an extended Einstein-Maxwell gravity containing a gauge invariance property. Extension is assumed to be addition of a directional coupli…
Central AdS Generalized Ay{ó}n-Beato-Garc{\'ı}a Black Holes and Joule-Thomson Expansion
Elham Ghasemi, Hossein Ghaffarnejad
In this paper, the Joule-Thomson (JT) adiabatic expansion is investigated for generalized Ayon-Beato-Garcia (ABG) regular black hole. It has a magnetic charge which makes central r…
Magnetic charge effects on thermodynamic phase transition of modified Anti de Sitter Ayón-Beato-García Black Holes with five parameters
Elham Ghasemi, Hossein Ghaffarnejad
In this letter we choose generalized Ayon Beato Gracia (ABG) magnetic charged black hole with five parameters to investigate possibility of thermodynamic phase transition and coexi…
Thermodynamic Phase Transition of Generalized Ayon-Beato Garcia Black Holes
Elham Ghasemi, Hossein Ghaffarnejad
In this work we study thermodynamics of generalized Ayon-Beato and Garcia (ABG) black hole metric which contains three parameters named as mass , magnetic charge and dimensi…
Physics-informed deep learning for three dimensional black holes
Emad Yaraie, Hossein Ghaffarnejad, Mohammad Farsam
According to AdS/DL (Anti de Sitter/ Deep Learning) correspondence given by \cite{Has}, in this paper with a data-driven approach and leveraging holography principle we have design…
Thermodynamics of 4D dS/AdS Gauss-Bonnet black holes from consistent gravity theory in presence of cloud of strings
Hossein Ghaffarnejad
By looking at the Lovelock theorem one can infer that the gravity model given by \cite{GL} could not applicable for all type of 4D Einstein Gauss Bonnet (GB) curved spacetimes. Bec…
Quantum State Dependence of Thermodynamic Phase Transition in 4D AdS Gauss-Bonnet Quantum Black Holes Surrounded With Cloud of Strings
Hossein Ghaffarnejad, Emad Yaraie, Mohammad Farsam
According to the Lovelock theorem where the model \cite{Glav} could not applicable for Einstein Gauss Bonnet (EGB) gravity in all 4D curved spacetimes, authors of the reference \ci…
Thermodynamic phase transition and Joule Thomson adiabatic expansion for dS/AdS Bardeen Black Holes with consistent 4D Gauss-Bonnet gravity
Hossein Ghaffarnejad, Elham Ghasami, Emad Yaraie +1
Instead of the work \cite{1} which in according to the Lovelock theorem it could not applicable for all types of 4D curved spacetimes of Einstein Gauss Bonnet (EGB) gravity, author…
Thermodynamics phase transition of Anti de Sitter Schwarzschild scalar-tensor-vector-Black Holes
Hossein Ghaffarnejad, Elham Ghasemi Kordkheilee
Instead of scalar tensor gravity models which is applicable for description of cosmic inflation with unknown dark sector of matter/energy, at presentense there are presented differ…
Bianchi I metric solutions with nonminimally coupled Einstein-Maxwell gravity theory
Hossein Ghaffarnejad, Hoda Gholipour
By using Bianchi I type of homogenous and anisotropic background metric having cylindrical symmetry in direction of a local cartesian coordinates system, we solve metric field…
Wave optics and weak gravitational lensing of lights from spherically symmetric static scalar vector Brans Dicke black holes in presence of the cosmological constant
Hossein Ghaffarnejad
This paper has three parts. In first step we use modified scalar tensor vector Brans Dicke gravity \cite{GH0} to obtain metric solution of a spherically symmetric static black hole…
Galaxy rotation curves and preferred reference frame effects
Hossein Ghaffarnejad, Razieh Dehghani
As an alternative to dark matter models we use generalized Jordan-Brans-Dicke scalar-vector-tensor (JBD-SVT) gravity model to study the behavior of the rotational velocities of tes…
Canonical quantization of anisotropic Bianchi I cosmology from scalar vector tensor Brans Dicke gravity
Hossein Ghaffarnejad
We applied a generalized scalar-vector-tensor Brans Dicke gravity model to study canonical quantization of an anisotropic Bianchi I cosmological model. Regarding an anisotropic Har…
Hairy black holes and holographic heat engine
Hossein Ghaffarnejad, Emad Yaraie, Mohammad Farsam +1
By considering AdS charged black hole in the context of extended thermodynamic as the working substance we use it as a heat engine. We investigate the effect of hairy charge on the…
Thermodynamic phase transition for Quintessence Dyonic Anti de Sitter Black Holes
Hossein Ghaffarnejad, Emad Yaraie, Mohammad Farsam
We study thermodynamic of a dyonic AdS black hole surrounded by quintessence dark energy where negative cosmological constant of AdS space behaves as pressure of the black hole. We…
Complexity growth and shock wave geometry in AdS-Maxwell-power-Yang-Mills theory
Emad Yaraie, Hossein Ghaffarnejad, Mohammad Farsam
We study effects of non-abelian gauge fields on the holographic characteristics for instance the evolution of computational complexity. To do so we choose Maxwell-power-Yang-Mills…
The Last Lost Charge And Phase Transition In Schwarzschild AdS Minimally Coupled to a Cloud of Strings
Hossein Ghaffarnejad, Mohammad Farsam
In this paper we study the Schwarzschild AdS black hole with a cloud of string background in an extended phase space and investigate a new phase transition related to the topologic…
Effects of a cloud of strings on the extended phase space of Einstein-Gauss-Bonnet AdS black holes
Hossein Ghaffarnejad, Emad Yaraie
In this paper we study the thermodynamics of Einstein-Gauss-Bonnet (EGB)-AdS black holes minimally coupled to a cloud of strings in an extended phase space where the cosmological c…
Holographic thermalization in AdS-Gauss-Bonnet gravity for small entangled regions
Hossein Ghaffarnejad, Emad Yaraie, Mohammad Farsam
In this paper we study the propagation of entanglement entropy after a global instantaneous quench on the CFT boundary of AdS bulk. We consider the Gauss-Bonnet model as a higher c…