output
19922026
researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions
Showing 2025 · gr-qcShow all

37 papers · 2 filters

gr-qc2025★ 1 cited

Primordial black hole driven cosmic acceleration

Konstantinos Dialektopoulos, Theodoros Papanikolaou, Vasilios Zarikas

We propose a natural mechanism for cosmic acceleration driven by primordial black holes (PBHs) with repulsive behavior, within a ''Swiss Cheese'' cosmological framework. Considerin…

gr-qc2025★ 1 cited

Ringdown of a black hole sourced by a Burkert-density effective anisotropic source

Yi Yang, Gaetano Lambiase, Ali Ovgun +2

We construct a static, spherically symmetric black hole spacetime sourced by an effective anisotropic matter distribution whose energy density follows the cored Burkert profile. Th…

gr-qc2025★ 1 cited

Constraining a de Broglie--Bohm quantum bounce cosmology with Planck data

Micol Benetti, Rudnei O. Ramos, Renato Silva +1

This work investigates a singularity-free early Universe within the paradigm of quantum cosmology. We develop a bouncing model where the singularity is resolved via the de Broglie-…

gr-qc2025★ 100 cited

GW250114: testing Hawking's area law and the Kerr nature of black holes

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1785

The gravitational-wave signal GW250114 was observed by the two LIGO detectors with a network matched-filter signal-to-noise ratio of 80. The signal was emitted by the coalescence o…

gr-qc2025★ 1 cited

Charge constraint on M87* with twisted light

Fabiano Feleppa, Fabrizio Tamburini, Gaetano Lambiase

We propose a novel method to constrain the electric charge of the supermassive black hole M87* by analyzing the orbital angular momentum content of the light it emits. By leveragin…

gr-qc2025

Is the CDM Model in Crisis?

Himanshu Chaudhary, Salvatore Capozziello, Subhrat Praharaj +2

We present strong evidence for dynamical dark energy that challenges the standard CDM model. Several dark energy scenarios are explored, including CDM, logarithmic, expo…

gr-qc2025★ 10 cited

Imprints of screened dark energy on nonlocal quantum correlations

Fabiano Feleppa, Gaetano Lambiase, Sunny Vagnozzi

We investigate how screening mechanisms, reconciling light scalar fields driving cosmic acceleration with local fifth force constraints, can be probed via their impact on non-local…

gr-qc2025★ 10 cited

Interferometric signature of higher-order images in a parametrized framework

Fabiano Feleppa, Fabio Aratore, Valerio Bozza

This paper investigates gravitational lensing in the strong deflection limit, focusing particularly on higher-order images produced near compact objects such as black holes and the…

gr-qc2025

Multiple-scale analysis of modified gravitational-wave propagation

Marco de Cesare, Mairi Sakellariadou, Benjamin Sutton

We employ multiple-scale analysis to systematically derive analytical approximations describing the cosmological propagation of gravitational waves beyond general relativity, in a…

gr-qc2025★ 3 cited

All-sky search for long-duration gravitational-wave transients in the first part of the fourth LIGO-Virgo-KAGRA Observing run

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1772

We present an all-sky search for long-duration gravitational waves (GWs) from the first part of the LIGO-Virgo-KAGRA fourth observing run (O4), called O4a and comprising data taken…

gr-qc2025★ 30 cited

Null geodesics, causal structure, and matter accretion in Lorentzian-Euclidean black holes

Salvatore Capozziello, Emmanuele Battista, Silvia De Bianchi

Recently, we introduced the Lorentzian-Euclidean black hole, a static and spherically symmetric solution of vacuum Einstein equations that exhibits a change in metric signature acr…

gr-qc2025

Generalised Aichelburg-Sexl and Self-Force for photons

Abedennour Dib, Aymeric Garnier, Alessandro Spallicci

We generalise the Aichelburg-Sexl Stress-Energy-Momentum tensor for massless particles to include motion with angular velocity, introducing tensorial spherical harmonics. Further,…

gr-qc2025★ 1 cited

Gravitational wave propagation in bigravity in the late universe

David Brizuela, Marco de Cesare, Araceli Soler Oficial

We carry out a detailed analytical investigation of the propagation of gravitational waves in ghost-free bimetric gravity in a late-time de Sitter epoch. In this regime, the dynami…

gr-qc2025★ 3 cited

Gravitational waves in minimal Maxwell gravity

Salvatore Capozziello, Qingyu Gan

We discuss the conversion mechanism from scalar field to gravitational waves in magnetic background in gravity minimal coupled to the Maxwell electrodynamics. Applying the c…

gr-qc2025★ 1 cited

New perspectives on the irregular singular point of the wave equation for a massive scalar field in Schwarzschild spacetime

Giampiero Esposito, Marco Refuto

For a massive scalar field in a fixed Schwarzschild background, the radial wave equation obeyed by Fourier modes is first studied. After reducing such a radial wave equation to its…

gr-qc2025★ 1 cited

Uncertainty Principles and Non-local Black Holes

Salvatore Capozziello, Giuseppe Meluccio, Jonas R. Mureika

We discuss the Generalized Uncertainty Principle and the Extended Uncertainty Principle in the context of black hole solutions coming from non-local theories of gravity, focusing,…

gr-qc2025

Cosmology of Cubic Poincaré Gauge gravity

Sebastian Bahamonde, Rebecca Briffa, Konstantinos Dialektopoulos +2

In this paper, we study flat FLRW cosmology for a Poincaré gauge theory containing cubic invariants that is free from ghosts in arbitrary backgrounds in the axial and vector sector…

gr-qc2025★ 1 cited

DSR-relativistic spacetime picture and the phenomenology of Planck-scale-modified time dilation

Giovanni Amelino-Camelia, Giulia Gubitosi, Pietro Pellecchia +2

The most active area of research in quantum-gravity phenomenology investigates the possibility of Planck-scale-modified dispersion relations, focusing mainly on two alternative sce…

gr-qc2025

Analytical calculation of self-force effects on a scalar particle in an eccentric orbit around a Schwarzschild black hole

Salvatore Capozziello, Nicola Menadeo, Davide Usseglio

In this work, we analytically investigate the effects of the scalar self-force exerted by a massless scalar field on a particle in a slightly eccentric orbit around a Schwarzschild…

gr-qc2025

A simple example of "non-minimal" Pre-Big Bang scenario

PIetro Conzinu, Maurizio Gasperini, Eliseo Pavone

We give an example of non-minimal pre-big bang scenario able to produce the PTA signal considering a modified evolution of the high-curvature string phase, including the contributi…

gr-qc2025★ 5 cited

Teleparallel dark energy in a nonflat universe

Rocco D'Agostino, Francesco Bajardi

In this paper, we investigate the cosmological dynamics of teleparallel dark energy in the presence of nonzero spatial geometry. Extending previous analyses of nonminimal scalar-te…

gr-qc2025★ 2 cited

Emergent Gravity from Topological Quantum Field Theory: Stochastic Gradient Flow Perspective away from the Quantum Gravity Problem

Andrea Addazi, Salvatore Capozziello, Jinglong Liu +3

We propose a scenario according to which the ultraviolet completion of General Relativity is realized through a stochastic gradient flow towards a topological BF theory. Specifical…

gr-qc2025★ 5 cited

Pre-geometric Einstein-Cartan Field Equations and Emergent Cosmology

Giuseppe Meluccio

The field equations of pre-geometric theories of gravity are derived and analysed, both without and with matter. After the spontaneous symmetry breaking that reduces the gauge symm…

gr-qc2025★ 6 cited

Hamiltonian Analysis of Pre-geometric Gravity

Andrea Addazi, Salvatore Capozziello, Antonino Marcianò +1

The Einstein-Cartan theory of gravity can arise from a mechanism of spontaneous symmetry breaking within the context of pre-geometric gauge theories. In this work, we develop the H…