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19922026
Showing 2014 · gr-qcShow all

47 papers · 2 filters

gr-qc2014★ 48 cited

A ring-lasers array for fundamental physics

A. Di Virgilio, M. Allegrini, A. Beghi +14

After reviewing the importance of light as a probe for testing the structure of space-time, we describe the GINGER project. GINGER will be a three-dimensional array of large size r…

gr-qc2014★ 22 cited

Extended Theories of Gravity with Generalized Energy Conditions

José P. Mimoso, Francisco S. N. Lobo, Salvatore Capozziello

We address the problem of the energy conditions in modified gravity taking into account the additional degrees of freedom related to scalar fields and curvature invariants. The lat…

gr-qc2014★ 17 cited

Emerging the dark sector from thermodynamics of cosmological systems with constant pressure

Alejandro Aviles, Norman Cruz, Jaime Klapp +1

We investigate the thermodynamics of general fluids that have the constriction that their pressure is constant. For example, this happens in the case of pure dust matter, for which…

gr-qc2014★ 28 cited

Kantowski-Sachs Universes sourced by a Skyrme fluid

Luca Parisi, Ninfa Radicella, Gaetano Vilasi

The Kantowski-Sachs cosmological model sourced by a Skyrme field and a cosmological constant is considered in the framework of General Relativity. Assuming a constant radial profil…

gr-qc2014★ 41 cited

Noether Symmetry Approach for teleparallel-curvature cosmology

Salvatore Capozziello, Mariafelicia De Laurentis, Ratbay Myrzakulov

We consider curvature-teleparallel gravity, where the gravitational Lagrangian density is given by an arbitrary function of the Ricci scalar and the torsion scalar …

gr-qc2014★ 55 cited

A directed search for gravitational waves from Scorpius X-1 with initial LIGO

The LIGO Scientific Collaboration, the Virgo Collaboration, J. Aasi +891

We present results of a search for continuously-emitted gravitational radiation, directed at the brightest low-mass X-ray binary, Scorpius X-1. Our semi-coherent analysis covers 10…

gr-qc2014★ 1.3k cited

Characterization of the LIGO detectors during their sixth science run

The LIGO Scientific Collaboration, The Virgo Collaboration, J. Aasi +867

In 2009-2010, the Laser Interferometer Gravitational-wave Observa- tory (LIGO) operated together with international partners Virgo and GEO600 as a network to search for gravitation…

gr-qc2014★ 3.5k cited

Advanced LIGO

The LIGO Scientific Collaboration

The Advanced LIGO gravitational wave detectors are second generation instruments designed and built for the two LIGO observatories in Hanford, WA and Livingston, LA. The two instru…

gr-qc2014★ 45 cited

Dynamical symmetries and observational constraints in scalar field cosmology

Andronikos Paliathanasis, Michael Tsamparlis, Spyros Basilakos

We propose to use dynamical symmetries of the field equations, in order to classify the dark energy models in the context of scalar field (quintessence or phantom) FLRW cosmologies…

gr-qc2014★ 8 cited

Chaos Removal in the gravity: the Mixmaster model

Riccardo Moriconi, Giovanni Montani, Salvatore Capozziello

We study the asymptotic dynamics of the Mixmaster Universe, near the cosmological singularity, considering gravity up to a quadratic corrections in the Ricci scalar . The…

gr-qc2014★ 6 cited

Self-gravitating systems in Extended Gravity

A. Stabile, S. Capozziello

Starting from the weak field limit, we discuss astrophysical applications of Extended Theories of Gravity where higher order curvature invariants and scalar fields are considered b…

gr-qc2014★ 12 cited

Noether Symmetry Approach for Dirac-Born-Infeld Cosmology

Salvatore Capozziello, Mariafelicia De Laurentis, Ratbay Myrzakulov

We consider the Noether Symmetry Approach for a cosmological model derived from a tachyon scalar field with a Dirac-Born-Infeld Lagrangian and a potential . Furthermore,…

gr-qc2014★ 70 cited

Probing Models of Extended Gravity using Gravity Probe B and LARES experiments

S. Capozziello, G. Lambiase, M. Sakellariadou +2

We consider models of Extended Gravity and in particular, generic models containing scalar-tensor and higher-order curvature terms, as well as a model derived from noncommutative s…

gr-qc2014★ 62 cited

Connecting early and late universe by gravity

Salvatore Capozziello, Mariafelicia De Laurentis, Orlando Luongo

Inflation and dark energy are two of the most relevant aspects of modern cosmology. These different epochs provide the universe is passing through accelerated phases soon after the…

gr-qc2014

Deformations of three-dimensional metrics

Daniela Pugliese, Cosimo Stornaiolo

We examine three-dimensional metric deformations based on a tetrad transformation through the action the matrices of scalar fields. We describe by this approach to deformation the…

gr-qc2014★ 58 cited

Searching for stochastic gravitational waves using data from the two co-located LIGO Hanford detectors

The LIGO Scientific Collaboration, the Virgo Collaboration, J. Aasi +873

Searches for a stochastic gravitational-wave background (SGWB) using terrestrial detectors typically involve cross-correlating data from pairs of detectors. The sensitivity of such…

gr-qc2014★ 4 cited

Bicharacteristics and Fourier integral operators in Kasner spacetime

Emmanuele Battista, Elisabetta Di Grezia, Giampiero Esposito

The scalar wave equation in Kasner spacetime is solved, first for a particular choice of Kasner parameters, by relating the integrand in the wave packet to the Bessel functions. An…

gr-qc2014

Towards obtaining Green functions for a Casimir cavity in de Sitter spacetime

Giampiero Esposito, George M. Napolitano

Recent work in the literature has studied rigid Casimir cavities in a weak gravitational field, or in de Sitter spacetime, or yet other spacetime models. The present review paper s…

gr-qc2014★ 82 cited

Two scalar field cosmology: Conservation laws and exact solutions

Andronikos Paliathanasis, Michael Tsamparlis

We consider the two scalar field cosmology in a FRW spatially flat spacetime where the scalar fields interact both in the kinetic part and the potential. We apply the Noether point…

gr-qc2014★ 19 cited

Constraints on Covariant Horava-Lifshitz Gravity from frame-dragging experiment

Ninfa Radicella, Gaetano Lambiase, Luca Parisi +1

The effects of Horava-Lifshitz corrections to the gravito-magnetic field are analyzed. Solutions in the weak field, slow motion limit, referring to the motion of a satellite around…

gr-qc2014★ 4.2k cited

Advanced Virgo: a 2nd generation interferometric gravitational wave detector

F. Acernese, M. Agathos, K. Agatsuma +231

Advanced Virgo is the project to upgrade the Virgo interferometric detector of gravitational waves, with the aim of increasing the number of observable galaxies (and thus the detec…

gr-qc2014★ 290 cited

Extreme neutron stars from Extended Theories of Gravity

Artyom V. Astashenok, Salvatore Capozziello, Sergei D. Odintsov

We discuss neutron stars with strong magnetic mean fields in the framework of Extended Theories of Gravity. In particular, we take into account models derived from and $f(\c…

gr-qc2014★ 68 cited

Invariant solutions and Noether symmetries in Hybrid Gravity

Andrzej Borowiec, Salvatore Capozziello, Mariafelicia De Laurentis +4

Symmetries play a crucial role in physics and, in particular, the Noether symmetries are a useful tool both to select models motivated at a fundamental level, and to find exact sol…

gr-qc2014★ 202 cited

Generalized energy conditions in Extended Theories of Gravity

Salvatore Capozziello, Francisco S. N. Lobo, José P. Mimoso

Theories of physics can be considered viable if the initial value problem and the energy conditions are formulated self-consistently. The former allow a uniquely determined dynamic…