362 citations · 8.3k across the 216 of their papers we have counts for
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Kaniadakis Holographic Dark Energy with Particle Horizon as IR Cutoff
A. Asvar, M. Mohammadi, A. Sheykhi
We construct a holographic dark-energy model using Kaniadakis entropy with the particle horizon as the infrared cutoff, consistently modifying both the holographic density and the…
Landauer's Principle as a Criterion for Thermodynamic Consistency in Generalized Black Hole Entropies
Fatemeh Sadeghi, Ahmad Sheykhi
Under the assumption that black hole horizon area is quantized, each Hawking evaporation step, during which the black hole loses mass and transitions to a lower area level, is inte…
From information bounds to infrared gravity: implications of Sharma-Mittal entropy
Abdelhakim Benkrane, Giuseppe Gaetano Luciano, Ahmad Sheykhi
The Sharma--Mittal (SM) entropy provides a two-parameter generalization encompassing both the Rényi and Tsallis statistical frameworks. In this work, we investigate its thermodynam…
Modified Entropy from Action Principle
A. Dehyadegari, A. Sheykhi
We propose a modified gravity theory by extending the Einstein-Hilbert action with an arbitrary function of the Ricci scalar and the Kretschmann scalar invariants. The resulting mo…
Slow-roll inflation in (dual) Kaniadakis cosmology
Leila Liravi, Ahmad Sheykhi
We investigate slow-roll inflation within the framework of Kaniadakis and dual Kaniadakis cosmology, where the usual entropy formalism is generalized through a deformation paramete…
Unified dark sector and Hubble-tension alleviation in scalar-vector-tensor gravity
Kimet Jusufi, Amir A. Khodahami, Ahmad Sheykhi +2
We investigate a scalar-vector-tensor theory in which matter is minimally coupled to a Jordan-frame metric , while a massive vector sector interacts with…
New Black hole Solutions in Gravity
A. Dehyadegari, A. Sheykhi
We investigate static and spherically symmetric vacuum solutions in the symmetric teleparallel modified theory of gravity. Starting from a recently proposed classif…
An Effective Framework for Entropy Modifications via Stochastic Metric Fluctuations
Amir A. Khodahami, Ahmad Sheykhi
Deviations from the area law of horizon entropy are often modeled phenomenologically through modified Friedmann equations in cosmology. In this work, we explore an effective stocha…
Hints Beyond CDM from Barrow and Tsallis Holographic Dark Energy with GO cutoff
G. G. Luciano, A. Paliathanasis, G. Leon +2
Barrow and Tsallis Holographic Dark Energy (HDE) are two recent extensions of the standard HDE framework, obtained by introducing generalized entropy corrections through the Barrow…
Observational constraints on the modified cosmology inspired by string T-duality
G. G. Luciano, A. Paliathanasis, A. Sheykhi
We explore the cosmological consequences of a modified cosmology inspired by string T-duality. We incorporate the zero-point length correction, , into the gravitational potent…
Holographic dark energy in modified Kaniadakis cosmology
A. Sheykhi, A. Asvar, E. Ebrahimi
It is well-known that any modification to the entropy expression not only change the energy density of the holographic dark energy, but also modifies the cosmological field equatio…
Big-Bang nucleosynthesis constraints on (dual) Kaniadakis cosmology
Ahmad Sheykhi, Ava Shahbazi Sooraki, Leila Liravi
We investigate the concept of Kaniadakis entropy and its dual formulation, examining their implications for gravitational dynamics within the framework where gravity emerges as an…
Dark Universe inspired by the Kaluza-Klein gravity and impact on Primordial Gravitational Waves
Kimet Jusufi, Giuseppe Gaetano Luciano, Ahmad Sheykhi +1
We explore the potential implications of Kaluza-Klein (KK) gravity in unifying the dark sector of the Universe. Through dimensional reduction in KK gravity, the 5D spacetime framew…
Barrow Cosmology and Big-Bang Nucleosynthesis
Ahmad Sheykhi, Ava Shahbazi Sooraki
Using thermodynamics-gravity conjecture, we present the formal derivation of the modified Friedmann equations inspired by the Barrow entropy, , where $0\leqδ\leq…
Modified theory in light of gravitational wave standard sirens
Mahnaz Asghari, Ahmad Sheykhi
In this paper, we ponder observational constraints on the modified gravity, where the gravitational action is a function of Ricci scalar plus the trace of the energy-m…
Holographic dark energy in Barrow cosmology with Granda-Oliveros IR cutoff
M. Motaghi, A. Sheykhi, E. Ebrahimi
Applying the modified Barrow entropy, inspired by the quantum fluctuation effects, to the cosmological background, and using thermodynamics-gravity conjuncture, the Friedmann equat…
Thermodynamical properties of nonsingular universe
Ahmad Sheykhi, Leila Liravi, Kimet Jusufi
We disclose the thermodynamical properties of the apparent horizon in a nonsingular universe. We take into account the zero-point length correction to the gravitational potential a…
Ghost Dark Energy in Tsallis and Barrow Cosmology
Esmaeil Ebrahimi, Ahmad Sheykhi
According to the thermodynamics-gravity conjecture, any modification to the entropy expression leads to the modified cosmological field equations. Based on this, we investigate the…
Growth of cosmic perturbations in the modified gravity
Mahnaz Asghari, Ahmad Sheykhi
We explore the generalized modified theory of gravity, where the gravitational Lagrangian is a function of Ricci scalar and the trace of the energy-momentum tensor …
Cosmology from String T-duality and zero-point length
Giuseppe Gaetano Luciano, Ahmad Sheykhi
Inspired by String T-duality and taking into account the zero-point length correction, , to the gravitational potential, we construct modified Friedmann equations by applying…
Apparent Dark Matter Inspired by Einstein Equation of State
Kimet Jusufi, Ahmad Sheykhi
The purpose of this article is twofold. First, by means of Padmanabhan's proposal on the emergence nature of gravity, we recover the CDM model and the effect of the dark matter…
Slow-roll inflation and growth of perturbations in Kaniadakis modification of Friedmann cosmology
Gaetano Lambiase, Giuseppe Gaetano Luciano, Ahmad Sheykhi
Kaniadakis entropy is a one-parameter deformation of the classical Boltzmann-Gibbs-Shannon entropy, arising from a self-consistent relativistic statistical theory. Assuming a Kania…
Note on agegraphic dark energy inspired by modified Barrow entropy
A. Sheykhi, S. Ghaffari
We revisit agegraphic dark energy (ADE) model when the entropy associated with the apparent horizon is in the form of Barrow entropy, , where indicat…
Apparent dark matter as a non-local manifestation of emergent gravity
Kimet Jusufi, Ahmad Sheykhi, Salvatore Capozziello
We disclose a close correspondence between Verlinde's Emergent Gravity (VEG) theory and the non-local gravity theories. Such non-local effects can play crucial role at small distan…