Physical Review Letters, ISSN 0031-9007, 12/2017, Volume 119, Issue 25, p. 251302

The observation of GW170817 and its electromagnetic counterpart implies that gravitational waves travel at the speed of light, with deviations smaller than a...

PHYSICS, MULTIDISCIPLINARY

PHYSICS, MULTIDISCIPLINARY

Journal Article

Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, 2015, Volume 2015, Issue 2, pp. 18 - 18

We have recently proposed a new class of gravitational scalar-tensor theories free from Ostrogradski instabilities, in ref. [1]. As they generalize Horndeski...

modified gravity | dark energy theory | SPACE | GRAVITY | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS | General Relativity and Quantum Cosmology | High Energy Physics - Theory | Physics | MATTER | TENSORS | INSTABILITY | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS | SCALAR FIELDS | DEGREES OF FREEDOM | SCALARS | METRICS | HAMILTONIANS | COUPLING | TRANSFORMATIONS

modified gravity | dark energy theory | SPACE | GRAVITY | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS | General Relativity and Quantum Cosmology | High Energy Physics - Theory | Physics | MATTER | TENSORS | INSTABILITY | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS | SCALAR FIELDS | DEGREES OF FREEDOM | SCALARS | METRICS | HAMILTONIANS | COUPLING | TRANSFORMATIONS

Journal Article

International Journal of Modern Physics D, ISSN 0218-2718, 11/2014, Volume 23, Issue 13, pp. 1443010 - 1-1443010-38

We review and extend a novel approach that we recently introduced, to describe general dark energy or scalar-tensor models. Our approach relies on an...

modified gravity | cosmological perturbations | Dark energy | PERTURBATIONS | ASTRONOMY & ASTROPHYSICS | Analysis | Force and energy | Tensors | Perturbation methods | Mathematical analysis | Scalars | Universe | Mathematical models | Equations of motion

modified gravity | cosmological perturbations | Dark energy | PERTURBATIONS | ASTRONOMY & ASTROPHYSICS | Analysis | Force and energy | Tensors | Perturbation methods | Mathematical analysis | Scalars | Universe | Mathematical models | Equations of motion

Journal Article

Physical Review Letters, ISSN 0031-9007, 05/2015, Volume 114, Issue 21, p. 211101

We introduce a new class of scalar-tensor theories of gravity that extend Horndeski, or "generalized Galileon," models. Despite possessing equations of motion...

PHYSICS, MULTIDISCIPLINARY | GRAVITY | Gravitation | Degrees of freedom | Mathematical analysis | Scalars | Joining | Derivatives | Equations of motion | Standards | General Relativity and Quantum Cosmology | High Energy Physics - Theory | Physics

PHYSICS, MULTIDISCIPLINARY | GRAVITY | Gravitation | Degrees of freedom | Mathematical analysis | Scalars | Joining | Derivatives | Equations of motion | Standards | General Relativity and Quantum Cosmology | High Energy Physics - Theory | Physics

Journal Article

Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, 12/2018, Volume 2018, Issue 12, pp. 25 - 25

We study the decay of gravitational waves into dark energy fluctuations pi, through the processes gamma -> pi pi and gamma -> gamma pi, made possible by the...

modified gravity | dark energy theory | gravitational waves / theory | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS

modified gravity | dark energy theory | gravitational waves / theory | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS

Journal Article

Classical and Quantum Gravity, ISSN 0264-9381, 11/2013, Volume 30, Issue 21, p. 214007

The effective field theory of cosmological perturbations stems from considering a cosmological background solution as a state displaying spontaneous breaking...

QUANTUM SCIENCE & TECHNOLOGY | PHYSICS, MULTIDISCIPLINARY | GRAVITY | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS | General Relativity and Quantum Cosmology | High Energy Physics - Theory | Physics

QUANTUM SCIENCE & TECHNOLOGY | PHYSICS, MULTIDISCIPLINARY | GRAVITY | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS | General Relativity and Quantum Cosmology | High Energy Physics - Theory | Physics

Journal Article

Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, 02/2013, Volume 2013, Issue 2, pp. 32 - 32

We propose a universal description of dark energy and modified gravity that includes all single-field models. By extending a formalism previously applied to...

ination | modified gravity | dark energy theory | SPACE | MATTER | ASTRONOMY & ASTROPHYSICS | CONSTANT | inflation | GRAVITY | PHYSICS, PARTICLES & FIELDS | Operators | Gravitation | Perturbation methods | Scalars | Constants | Field theory | Joining | Dark energy | Formalism | Physics | Astrophysics | TENSORS | FIELD OPERATORS | DEGREES OF FREEDOM | METRICS | INFLATONS | INFLATIONARY UNIVERSE | FIELD THEORIES | EVOLUTION | NONLUMINOUS MATTER | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | FLUCTUATIONS | SCALARS | PERTURBATION THEORY | GRAVITATION | RENORMALIZATION

ination | modified gravity | dark energy theory | SPACE | MATTER | ASTRONOMY & ASTROPHYSICS | CONSTANT | inflation | GRAVITY | PHYSICS, PARTICLES & FIELDS | Operators | Gravitation | Perturbation methods | Scalars | Constants | Field theory | Joining | Dark energy | Formalism | Physics | Astrophysics | TENSORS | FIELD OPERATORS | DEGREES OF FREEDOM | METRICS | INFLATONS | INFLATIONARY UNIVERSE | FIELD THEORIES | EVOLUTION | NONLUMINOUS MATTER | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | FLUCTUATIONS | SCALARS | PERTURBATION THEORY | GRAVITATION | RENORMALIZATION

Journal Article

Journal of cosmology and astroparticle physics, ISSN 1475-7516, 05/2019, Volume 2019, Issue 5, pp. 52 - 52

A light scalar degree of freedom, as the one possibly responsible for the accelerated expansion of the Universe, could leave observable traces in the inspiral...

General Relativity and Quantum Cosmology | High Energy Physics - Phenomenology | Astrophysics | Cosmology and Extra-Galactic Astrophysics | High Energy Physics - Theory | Physics

General Relativity and Quantum Cosmology | High Energy Physics - Phenomenology | Astrophysics | Cosmology and Extra-Galactic Astrophysics | High Energy Physics - Theory | Physics

Journal Article

Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, 08/2013, Volume 2013, Issue 8, pp. 25 - 25

We propose a minimal description of single field dark energy/modified gravity within the effective field theory formalism for cosmological perturbations, which...

modified gravity | dark energy theory | ASTRONOMY & ASTROPHYSICS | FIELD-EQUATIONS | PHYSICS, PARTICLES & FIELDS | Operators | Perturbation methods | Mathematical analysis | Astronomical models | Constants | Mathematical models | Dark energy | Gages | Gauges | Physics | Astrophysics | TENSORS | APPROXIMATIONS | EQUATIONS OF MOTION | POTENTIALS | LAGRANGIAN FUNCTION | FIELD THEORIES | SPACE | EVOLUTION | NONLUMINOUS MATTER | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | SCALAR FIELDS | PERTURBATION THEORY | GRAVITATION | TIME DEPENDENCE

modified gravity | dark energy theory | ASTRONOMY & ASTROPHYSICS | FIELD-EQUATIONS | PHYSICS, PARTICLES & FIELDS | Operators | Perturbation methods | Mathematical analysis | Astronomical models | Constants | Mathematical models | Dark energy | Gages | Gauges | Physics | Astrophysics | TENSORS | APPROXIMATIONS | EQUATIONS OF MOTION | POTENTIALS | LAGRANGIAN FUNCTION | FIELD THEORIES | SPACE | EVOLUTION | NONLUMINOUS MATTER | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | SCALAR FIELDS | PERTURBATION THEORY | GRAVITATION | TIME DEPENDENCE

Journal Article

Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, 05/2017, Volume 2017, Issue 5, pp. 33 - 33

Most existing theories of dark energy and/or modified gravity, involving a scalar degree of freedom, can be conveniently described within the framework of the...

modified gravity | cosmological perturbation theory | dark energy theory | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS | DISPERSIONS | PHYSICS OF ELEMENTARY PARTICLES AND FIELDS | DISTURBANCES | NONLUMINOUS MATTER | SCALAR FIELDS | DEGREES OF FREEDOM | PERTURBATION THEORY | EQUATIONS | GRAVITATION | MINKOWSKI SPACE | LAGRANGIAN FUNCTION | DISPERSION RELATIONS

modified gravity | cosmological perturbation theory | dark energy theory | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS | DISPERSIONS | PHYSICS OF ELEMENTARY PARTICLES AND FIELDS | DISTURBANCES | NONLUMINOUS MATTER | SCALAR FIELDS | DEGREES OF FREEDOM | PERTURBATION THEORY | EQUATIONS | GRAVITATION | MINKOWSKI SPACE | LAGRANGIAN FUNCTION | DISPERSION RELATIONS

Journal Article

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, ISSN 1475-7516, 10/2019, Volume 2019, Issue 10, pp. 72 - 72

We study the decay of gravitational waves into dark energy fluctuations pi, taking into account the large occupation numbers. We describe dark energy using the...

modified gravity | dark energy theory | gravitational waves / theory | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS

modified gravity | dark energy theory | gravitational waves / theory | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS

Journal Article

Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, 02/2019, Volume 2019, Issue 2, pp. 36 - 36

We show that theories of mimetic gravity can be viewed as degenerate higher-order scalar-tensor (DHOST) theories that admit an extra local (gauge) symmetry in...

Cosmological perturbation theory | Dark energy theory | Modified gravity | modified gravity | dark energy theory | cosmological perturbation theory | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS

Cosmological perturbation theory | Dark energy theory | Modified gravity | modified gravity | dark energy theory | cosmological perturbation theory | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS

Journal Article

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, ISSN 1475-7516, 12/2019, Volume 2019, Issue 12, pp. 11 - 11

We introduce k-evolution, a relativistic N-body code based on gevolution, which includes clustering dark energy among its cosmological components. To describe...

cosmological simulations | modified gravity | power spectrum | ASTRONOMY & ASTROPHYSICS | dark energy theory | SIMULATIONS | PHYSICS, PARTICLES & FIELDS

cosmological simulations | modified gravity | power spectrum | ASTRONOMY & ASTROPHYSICS | dark energy theory | SIMULATIONS | PHYSICS, PARTICLES & FIELDS

Journal Article

Living Reviews in Relativity, ISSN 2367-3613, 12/2018, Volume 21, Issue 1, pp. 1 - 345

Euclid is a European Space Agency medium-class mission selected for launch in 2020 within the cosmic vision 2015â€“2025 program. The main goal of Euclid is to...

Galaxy evolution | Cosmology | Dark energy | Astrophysics and Astroparticles | Classical and Quantum Gravitation, Relativity Theory | Physics | GALAXY REDSHIFT SURVEY | COLD DARK-MATTER | MICROWAVE-ANISOTROPY-PROBE | LARGE-SCALE STRUCTURE | MODIFIED NEWTONIAN DYNAMICS | LENSING MASS RECONSTRUCTION | N-BODY SIMULATIONS | GENERALIZED CHAPLYGIN-GAS | DIGITAL-SKY-SURVEY | 3-POINT CORRELATION-FUNCTION | PHYSICS, PARTICLES & FIELDS | Physics - Cosmology and Nongalactic Astrophysics | ASTRONOMY AND ASTROPHYSICS | Review

Galaxy evolution | Cosmology | Dark energy | Astrophysics and Astroparticles | Classical and Quantum Gravitation, Relativity Theory | Physics | GALAXY REDSHIFT SURVEY | COLD DARK-MATTER | MICROWAVE-ANISOTROPY-PROBE | LARGE-SCALE STRUCTURE | MODIFIED NEWTONIAN DYNAMICS | LENSING MASS RECONSTRUCTION | N-BODY SIMULATIONS | GENERALIZED CHAPLYGIN-GAS | DIGITAL-SKY-SURVEY | 3-POINT CORRELATION-FUNCTION | PHYSICS, PARTICLES & FIELDS | Physics - Cosmology and Nongalactic Astrophysics | ASTRONOMY AND ASTROPHYSICS | Review

Journal Article