Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of Naples Federico IIIT4k papers
- Centre National de la Recherche ScientifiqueFR3.7k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT3.4k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR3.3k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di GenovaIT3.1k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR3.1k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT3k papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIT2.9k papers
- Rutherford Appleton LaboratoryGB2.8k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT2.8k papers
- Sapienza University of RomeIT2.7k papers
- The Ohio State UniversityUS2.7k papers
24 papers · 2 filters
Higher-order gravity and the cosmological background of gravitational waves
S. Capozziello, M. De Laurentis, M. Francaviglia
The cosmological background of gravitational waves can be tuned by the higher-order corrections to the gravitational Lagrangian. In particular, it can be shown that assuming $R^{1+…
Space-time deformations as extended conformal transformations
S. Capozziello, C. Stornaiolo
A definition of space-time metric deformations on an -dimensional manifold is given. We show that such deformations can be regarded as extended conformal transformations. In par…
Solar system and equivalence principle constraints on f(R) gravity by chameleon approach
Salvatore Capozziello, Shinji Tsujikawa
We study constraints on f(R) dark energy models from solar system experiments combined with experiments on the violation of equivalence principle. When the mass of an equivalent sc…
Optics of spin-1 particles from gravity-induced phases
G. Papini, G. Scarpetta, A. Feoli +1
The Maxwell and Maxwell-de Rham equations can be solved exactly to first order in an external gravitational field. The gravitational background induces phases in the wave functions…
First joint Gravitational Waves search by the Auriga-Explorer-Nautilus-Virgo collaboration
Virgo collaboration
We present results of the search for coincident burst excitations over a 24 hours long data set collected by AURIGA, EXPLORER, NAUTILUS and Virgo detectors during September 2005. T…
Spherically symmetric ADM gravity with variable G and Lambda(c)
Giampiero Esposito, Claudio Rubano, Paolo Scudellaro
This paper investigates the Arnowitt--Deser--Misner (hereafter ADM) form of spherically symmetric gravity with variable Newton parameter G and cosmological term Lambda(c). The Newt…
Spherical symmetry in -gravity
S. Capozziello, A. Stabile, A. Troisi
Spherical symmetry in gravity is discussed in details considering also the relations with the weak field limit. Exact solutions are obtained for constant Ricci curvature sca…
The Newtonian Limit of F(R) gravity
S. Capozziello, A. Stabile, A. Troisi
A general analytic procedure is developed to deal with the Newtonian limit of gravity. A discussion comparing the Newtonian and the post-Newtonian limit of these models is p…
Incompressible fluid inside an astrophysical black hole?
Fabrizio Canfora
It is argued that under natural hypothesis the Fermions inside a black hole formed after the collapse of a neutron star could form a non compressible fluid (well before reaching th…
f(R) Gravity with Torsion: The Metric-Affine Approach
S. Capozziello, R. Cianci, C. Stornaiolo +1
The role of torsion in f(R) gravity is considered in the framework of metric-affine formalism. We discuss the field equations in empty space and in presence of perfect fluid matter…
Noether symmetry approach to scalar-field-dominated cosmology with dynamically evolving G and Lambda
Alfio Bonanno, Giampiero Esposito, Claudio Rubano +1
This paper studies the cosmological equations for a scalar field Phi in the framework of a quantum gravity modified Einstein--Hilbert Lagrangian where G and Lambda are dynamical va…
Black hole evaporation in a spherically symmetric non-commutative space-time
Elisabetta Di Grezia, Giampiero Esposito, Gennaro Miele
Recent work in the literature has studied the quantum-mechanical decay of a Schwarzschild-like black hole, formed by gravitational collapse, into almost-flat space-time and weak ra…
Some exact solutions with torsion in 5-D Einstein-Gauss-Bonnet gravity
F. Canfora, A. Giacomini, S. Willison
Exact solutions with torsion in Einstein-Gauss-Bonnet gravity are derived. These solutions have a cross product structure of two constant curvature manifolds. The equations of moti…
The evolution of density perturbations in f(R) gravity
S. Carloni, P. K. S. Dunsby, A. Troisi
We give a rigorous and mathematically well defined presentation of the Covariant and Gauge Invariant theory of scalar perturbations of a Friedmann-Lemaitre-Robertson-Walker univers…
Stochastic background of relic scalar gravitational waves from scalar-tensor gravity
S. Capozziello, Ch. Corda, M De Laurentis
A stochastic background of relic gravitational waves is achieved by the so called adiabatically-amplified zero-point fluctuations process derived from early inflation. In principle…
The gravity of magnetic stresses and energy
Giuseppe Bimonte, Enrico Calloni, Luigi Rosa
In the framework of designing laboratory tests of relativistic gravity, we investigate the gravitational field produced by the magnetic field of a solenoid. Observing this field mi…
Abelian Magnetic Monopoles and Topologically Massive Vector Bosons in Scalar-Tensor Gravity with Torsion Potential
S. A. Ali, C. Cafaro, S. Capozziello +1
A Lagrangian formulation describing the electromagnetic interaction - mediated by topologically massive vector bosons - between charged, spin-(1/2) fermions with an abelian magneti…
Tomographic Representation of Minisuperspace Quantum Cosmology and Noether Symmetries
S. Capozziello, V. I. Man'ko, G. Marmo +1
The probability representation, in which cosmological quantum states are described by a standard positive probability distribution, is constructed for minisuperspace models selecte…
Some remarks on the dynamical systems approach to fourth order gravity
S. Carloni, A. Troisi, P. K. S. Dunsby
Building on earlier work, we discuss a general framework for exploring the cosmological dynamics of Higher Order Theories of Gravity. We show that once the theory of gravity has be…
Nonlinear Realization of the Local Conform-Affine Symmetry Group for Gravity in the Composite Fiber Bundle Formalism
S. A. Ali, S. Capozziello
A gauge theory of gravity based on a nonlinear realization (NLR) of the local Conform-Affine (CA) group of symmetry transformations is presented. The coframe fields and gauge conne…
Strong deflection limit of black hole gravitational lensing with arbitrary source distances
V. Bozza, G. Scarpetta
The gravitational field of supermassive black holes is able to strongly bend light rays emitted by nearby sources. When the deflection angle exceeds , gravitational lensing can…
Spherically symmetric solutions in f(R)-gravity via Noether Symmetry Approach
S. Capozziello, A. Stabile, A. Troisi
We search for spherically symmetric solutions of f(R) theories of gravity via the Noether Symmetry Approach. A general formalism in the metric framework is developed considering a…
The cosmological constant as an eigenvalue of f(R)-gravity Hamiltonian constraint
S. Capozziello, R. Garattini
In the framework of ADM formalism, it is possible to find out eigenvalues of the WDW equation with the meaning of vacuum states, i.e. cosmological constants, for f(R) theories of g…
Cosmological dynamics of Scalar--Tensor Gravity
S Carloni, J A Leach, S Capozziello +1
We study the phase--space of FLRW models derived from Scalar--Tensor Gravity where the non--minimal coupling is and the effective potential is . Our analysis…