360 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of MinhoPT56 papers
- Universidade do PortoPT36 papers
- University of LisbonPT17 papers
- International Iberian Nanotechnology LaboratoryPT14 papers
- Instituto Superior TécnicoPT13 papers
- QuantaLabPT11 papers
- Centre National de la Recherche ScientifiqueFR10 papers
- Columbia UniversityUS10 papers
- Institució Catalana de Recerca i Estudis AvançatsES10 papers
- University of AveiroPT10 papers
- Beijing Computational Science Research CenterCN9 papers
- Institut des Hautes Études ScientifiquesFR9 papers
13 papers · 1 filter
Theories of gravity with nonminimal matter-curvature coupling and the de Sitter swampland conjectures
Orfeu Bertolami, Cláudio Gomes, Paulo M. Sá
We discuss, in the context of alternative theories of gravity with nonminimal coupling between matter and curvature, if inflationary solutions driven by a single scalar field can b…
Multi-field cold and warm inflation and the de Sitter swampland conjectures
Orfeu Bertolami, Paulo M. Sá
We discuss under which conditions multi-field cold and warm inflationary models with canonical kinetic energy terms are compatible with the swampland conjectures about the emergenc…
Quantum kinetic theory of Jeans instability in non-minimal matter-curvature coupling gravity
Cláudio Gomes, Kamel Ourabah
We present a quantum treatment of the Jeans gravitational instability in the Newtonian limit of the non-minimal matter-curvature coupling gravity model. By relying on Wigner functi…
The Virgo O3 run and the impact of the environment
F. Acernese, M. Agathos, A. Ain +486
Sources of geophysical noise (such as wind, sea waves and earthquakes) or of anthropogenic noise impact ground-based gravitational-wave interferometric detectors, causing transient…
First joint observation by the underground gravitational-wave detector, KAGRA, with GEO600
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1669
We report the results of the first joint observation of the KAGRA detector with GEO600. KAGRA is a cryogenic and underground gravitational-wave detector consisting of a laser inter…
Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO data
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1669
Results are presented for a semi-coherent search for continuous gravitational waves from the low-mass X-ray binary Scorpius X-1, using a hidden Markov model (HMM) to allow for spin…
All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO and Advanced Virgo O3 data
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1667
We present results of an all-sky search for continuous gravitational waves which can be produced by spinning neutron stars with an asymmetry around their rotation axis, using data…
Tests of General Relativity with GWTC-3
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1682
The ever-increasing number of detections of gravitational waves (GWs) from compact binaries by the Advanced LIGO and Advanced Virgo detectors allows us to perform ever-more sensiti…
Cassini and extra force constraints to nonminimally coupled gravity with screening mechanism
Riccardo March, Orfeu Bertolami, Marco Muccino +2
We consider a nonminimally coupled curvature-matter gravity theory at the Solar System scale. Both a fifth force of Yukawa type and a further non-Newtonian extra force that arises…
Pressureless stationary solutions in a Newton-Yukawa gravity model
T. D. Ferreira, J. Novo, N. A. Silva +2
Non-minimally coupled curvature-matter gravity models are an interesting alternative to the Theory of General Relativity and to address the dark energy and dark matter cosmological…
Inflation, phase transitions and the cosmological constant
Orfeu Bertolami
Cosmological phase transitions are thought to have taken place at the early Universe imprinting their properties on the observable Universe. There is strong evidence that, through…
Exploring gravitational-wave detection and parameter inference using Deep Learning methods
João D. Álvares, José A. Font, Felipe F. Freitas +5
We explore machine learning methods to detect gravitational waves (GW) from binary black hole (BBH) mergers using deep learning (DL) algorithms. The DL networks are trained with gr…
An Ostrogradsky Instability Analysis of Non-minimally Coupled Weyl Connection Gravity Theories
Rodrigo Baptista, Orfeu Bertolami
We study the Hamiltonian formalism of the non-minimally coupled Weyl connection gravity (NMCWCG) in order to check whether Ostrogradsky instabilities are present. The Hamiltonian o…