299 citations · 465 across the 33 of their papers we have counts for
37 papers
Observational constraints on Luciano-Saridakis holographic dark energy
Matías Leizerovich, Susana J. Landau, Giuseppe Gaetano Luciano +2
Holographic dark energy (HDE) models provide a natural framework for linking gravitational thermodynamics to the late-time accelerated expansion of the Universe. In this work, we i…
Beyond dynamical dark energy: the role of dark sector interactions after DESI DR2
Weiqiang Yang, Sibo Zhang, Supriya Pan +2
Recent DESI DR2 observations have renewed interest in extensions of the CDM cosmological model, particularly through indications of a time-varying dark energy equation of state.…
The generalized second law as a thermodynamic selection criterion for dynamical dark energy
Marcos H. Cruz, Miguel Cruz, Joel Saavedra +1
The growing number of generalized horizon entropy proposals has led to a wide variety of modified cosmological models, yet there is currently no general physical principle capable…
Dark energy perturbations and the robustness of cosmological neutrino-mass constraints
Yu-Hang Yang, Emmanuel N. Saridakis, Yi-Fu Cai +1
Cosmological observations are placing increasingly stringent bounds on the sum of neutrino masses, approaching the lower limits implied by neutrino oscillation experiments. Recent…
Rotating traversable wormholes and particle dynamics in gravity
G. G. L. Nashed, Waleed El Hanafy, Amare Abebe +2
Traversable wormholes are among the most interesting solutions of gravitational theories, but within General Relativity they generally require exotic matter violating the null ener…
Cosmologically viable non-polynomial quasi-topological gravity: explicit models, CDM limit and observational constraints
Emmanuel N. Saridakis
We investigate the cosmological implications of non-polynomial quasi-topological gravity (NPQTG), a novel class of modified gravitational theories in which the background dynamics…
Accelerating scaling solutions from dark matter particle creation
Sudip Halder, Jaume de Haro, Supriya Pan +3
This article opens new window to obtain accelerating scaling attractors without any need of dark energy. We study cosmological dynamics in a two-fluid system where pressureless dar…
Primordial black hole formation from transient cosmology
Gerasimos Kouniatalis, Theodoros Papanikolaou, Spyros Basilakos +1
We study primordial black hole (PBH) formation in a minimally coupled teleparallel cosmology that generates a transient departure from standard radiation domination. The mod…
Observational constraints on Luciano-Saridakis entropic cosmology
Matías Leizerovich, Susana J. Landau, Giuseppe Gaetano Luciano +2
A recently proposed generalized entropy by Luciano and Saridakis extends the standard Boltzmann-Gibbs and Bekenstein-Hawking framework through a microscopically motivated construct…
New modified cosmology from a new generalized entropy
G. G. Luciano, E. N. Saridakis
We develop new modified cosmological scenarios by applying the first law of thermodynamics at the Universe horizon, utilizing a new entropic functional that generalizes the standar…
Highly suppressed tensor-to-scalar ratio from a modified Lennard-Jones inflationary potential
Panagiotis G. Stavros, Spyros Basilakos, Emmanuel N. Saridakis
The increasingly stringent observational bounds on primordial gravitational waves strongly constrain inflationary model building, favoring scenarios that predict highly suppressed…
Chaotic imprints of dark matter in extreme mass-ratio inspirals
Mustapha Azreg-Aïnou, Mubasher Jamil, Emmanuel N. Saridakis
Extreme mass-ratio inspirals (EMRIs) are among the most powerful probes of strong-field gravity and of the environments surrounding supermassive compact objects. Motivated by the e…
A null test of the Hubble tension
Gerasimos Kouniatalis, Emmanuel N. Saridakis
The origin of the Hubble tension remains one of the central open problems in modern cosmology, with competing explanations invoking either early-Universe physics, late-time modific…
Ultra-fast growth of primordial black holes through radiative absorption
Dimitris S. Kallifatides, Theodoros Papanikolaou, Emmanuel N. Saridakis
We show that Schwarzschild primordial black holes (PBHs) formed in the radiation-dominated era can grow extremely rapidly through governed by the fu…
From Cosmology to Cosmonomy
Emmanuel N. Saridakis
For most of its history, cosmology was a qualitatively constrained discourse on the universe, shaped by limited observational access and the absence of global dynamical laws. This…
Topological and optical signatures of modified black-hole entropies
Ankit Anand, Kimet Jusufi, Spyros Basilakos +1
We investigate how deviations from the Bekenstein-Hawking entropy modify black-hole spacetimes through the recently proposed entropy-geometry correspondence. For four representativ…
Primordial black hole dark matter from ultra-slow-roll inflation in Horndeski gravity
Despina Totolou, Theodoros Papanikolaou, Emmanuel N. Saridakis
Primordial black holes (PBHs) provide a well-motivated non-particle candidate for dark matter, requiring an enhancement of curvature perturbations on small inflationary scales cons…
Higgs-like inflation in scalar-torsion gravity in light of ACT-SPT-DESI constraints
Nitesh Kumar, Giovanni Otalora, Rodrigo Reyes +3
We study Higgs-like inflation in the framework of scalar-torsion gravity, focusing on the general class of theories in which gravitation is mediated by torsion rather than…
Bohmian Quantum Cosmology from the Wheeler-DeWitt Equation
Spyros Basilakos, Gerasimos Kouniatalis, Emmanuel N. Saridakis +1
We construct a Bohmian quantum cosmological model for a spatially flat Friedmann Robertson Walker universe filled with a single scalar field whose potential provides a unified desc…
Decoupling perturbations from background in gravity: the square-root correction and the impact on the tension
Chunyu Li, Xin Ren, Yuhang Yang +2
We investigate a perturbation-level modification of symmetric teleparallel gravity of the form and assess its potential to ease the tension. The square-…
Baryogenesis constraints on generalized mass-to-horizon entropy
Giuseppe Gaetano Luciano, Emmanuel N. Saridakis
We investigate the generation of the baryon asymmetry within the cosmological framework based on a generalized mass-to-horizon entropy. This entropy, recently proposed as a power-l…
Probing the sound speed and clustering of dark energy
Yuhang Yang, Qingqing Wang, Xin Ren +2
Recent Dark Energy Spectroscopic Instrument (DESI) observations favor a dynamical dark energy component with a time-varying equation-of-state, potentially crossing the cosmological…
Effective matter sectors from modified entropies
Ankit Anand, Sahil Devdutt, Kimet Jusufi +1
We present a general formalism linking modified entropy functions directly to a modified spacetime metric and, subsequently, to an effective matter sector of entropic origin. In pa…
Cosmological tensions in the era of precision cosmology: Insights from Tensions in Cosmology 2025
Eleonora Di Valentino, Jackson Levi Said, Emmanuel N. Saridakis
The ``Tensions in Cosmology'' series of conferences has been established as one of the main venues where the cosmological community collectively assesses the cracks in the concorda…