1.4k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- S. P. Sorella2 profiles170 · h 33
- R. O. Ramos121 · h 34
- M. S. Guimaraes2 profiles73 · h 20
- D. Dudal66 · h 37
- V. Lemes2 profiles64 · h 17
- M. Capri58 · h 21
- D. G. Barci50 · h 13
- Anzhong Wang2 profiles47 · h 48
- M. D. Da Silva2 profiles37 · h 17
- R. Sobreiro2 profiles36 · h 19
- H. Verschelde33 · h 35
- H. P. de Oliveira31 · h 16
- Charles UniversityCZ1.9k papers
- Centre National de la Recherche ScientifiqueFR1.9k papers
- Centro Brasileiro de Pesquisas FísicasBR1.9k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.8k papers
- Fermi National Accelerator LaboratoryUS1.8k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.8k papers
- Panjab UniversityIN1.7k papers
- Tata Institute of Fundamental ResearchIN1.7k papers
- Brown UniversityUS1.7k papers
- University of DelhiIN1.7k papers
- University of Nebraska–LincolnUS1.7k papers
- Florida State UniversityUS1.7k papers
38 papers · 1 filter
Thermal enhancement of inflationary magnetic fields
Arjun Berera, Suddhasattwa Brahma, Zizang Qiu +1
We investigate primordial magnetogenesis by assuming the gauge field is prepared in a thermal state during inflation rather than the standard Bunch-Davies vacuum. The temperature $…
Quintom Dark Energy: Future Attractor and Phantom Crossing in Light of DESI DR2 Observation
Phusuda Thanankullaphong, Prasanta Sahoo, Prajwal Hassan Puttasiddappa +1
We study the late-time cosmological dynamics of a two-field dark energy model consisting of a canonical quintessence scalar field and a phantom scalar field in a spatially flat FLR…
WI2easy: warm inflation dynamics made easy
Gabriel S. Rodrigues, Rudnei O. Ramos
We present WI2easy, a Mathematica package for high-precision analysis of warm inflation (WI) dynamics, enabling efficient computation of both background evolution and curvature per…
Constraints on Metastable Dark Energy Decaying into Dark Matter
J. S. T. de Souza, G. S. Vicente, L. L. Graef
We revisit the proposal that an energy transfer from dark energy into dark matter can be described in field theory by a first order phase transition. We analyze the model proposed…
Defying eternal inflation in warm inflation with a negative running
Gabriele Montefalcone, Rudnei O. Ramos, Gustavo S. Vicente +1
It was pointed out previously~\cite{Kinney:2014jya} that a sufficiently negative running of the spectral index of curvature perturbations from (ordinary i.e. cold) inflation is abl…
Can the angular scale of cosmic homogeneity be used as a cosmological test?
Xiaoyun Shao, Rodrigo S. Gonçalves, Carlos A. P. Bengaly +3
In standard cosmology, the cosmic homogeneity scale is the transition scale above which the patterns arising from non-uniformities -- such as groups and clusters of galaxies, voids…
Running and running of the running of the scalar spectral index in warm inflation
Suratna Das, Rudnei O. Ramos
Next generation of cosmological observations are expected to improve the measurements of several quantities connected to the primordial inflation in the early Universe. These quant…
Spherical collapse of non-top-hat profiles in the presence of dark energy with arbitrary sound speed
R. C. Batista, H. P. de Oliveira, L. R. W. Abramo
We study the spherical collapse of non-top-hat matter fluctuations in the presence of dark energy with arbitrary sound speed. The model is described by a system of partial differen…
Cosmology and the massive photon frequency shift in the Standard-Model Extension
Alessandro D. A. M. Spallicci, José A. Helayël-Neto, Martin López-Corredoira +1
The total red shift might be recast as a combination of the expansion red shift and a static shift due to the energy-momentum tensor non-conservation of a photon propagating th…
Measuring the cosmic homogeneity scale with SDSS-IV DR16 Quasars
Rodrigo S. Gonçalves, Gabriela C. Carvalho, Uendert Andrade +3
We report measurements of the scale of cosmic homogeneity () using the recently released quasar sample of the sixteenth data release of the Sloan Digital Sky Survey (SDSS-IV…
The miniJPAS survey: a preview of the Universe in 56 colours
S. Bonoli, A. Marín-Franch, J. Varela +166
The Javalambre-Physics of the Accelerating Universe Astrophysical Survey (J-PAS) will soon start to scan thousands of square degrees of the northern extragalactic sky with a unique…
Hot thermal universe endowed with massive dark vector fields and the Hubble tension
Luis A. Anchordoqui, Santiago E. Perez Bergliaffa
The value of Hubble constant inferred from Planck measurements of anisotropies in the cosmic microwave background is at tension with direct astronomical measurements at low…
Unified early and late Universe cosmology through dissipative effects in steep quintessential inflation potential models
Gustavo B. F. Lima, Rudnei O. Ramos
By making use of a class of steep exponential type of potentials, which has been recently used to describe quintessential inflation, we show how a unified picture for both inflatio…
Observational Constraints on Warm Inflation in Loop Quantum Cosmology
Micol Benetti, Leila Graef, Rudnei O. Ramos
By incorporating quantum aspects of gravity, Loop Quantum Cosmology (LQC) provides a self-consistent extension of the inflationary scenario, allowing for modifications in the primo…
Warm inflation as a way out of the swampland
Meysam Motaharfar, Vahid Kamali, Rudnei O. Ramos
We discuss how dissipative effects and the presence of a thermal radiation bath, which are inherent characteristics of the warm inflation dynamics, can evade the recently proposed…
Primordial gravitational waves and the H0-tension problem
Leila L. Graef, Micol Benetti, Jailson S. Alcaniz
We analyse the H0-tension problem in the context of models of the early universe that predict a blue tilted spectrum of primordial gravitational waves (GW's). By considering the GW…
Modified gravity versus shear viscosity: imprints on the scalar matter perturbations
C. M. S. Barbosa, H. Velten, J. C. Fabris +1
Cosmological scalar perturbation theory studied in the Newtonian gauge depends on two potentials and . In General Relativity (GR) they must coincide () in the absence o…
Identifying Universality in Warm Inflation
Arjun Berera, Joel Mabillard, Mauro Pieroni +1
Ideas borrowed from renormalization group are applied to warm inflation to characterize the inflationary epoch in terms of flows away from the de Sitter regime. In this framework d…
The and tensions and the scale invariant spectrum
Micol Benetti, Leila L. Graef, Jailson S. Alcaniz
In a previous communication we showed that a joint analysis of Cosmic Microwave Background (CMB) data and the current measurement of the local expansion rate favours a model with a…
Measuring the transverse baryonic acoustic scale from the SDSS DR11 galaxies
G. C. Carvalho, A. Bernui, M. Benetti +3
We report five measurements of the transverse baryonic acoustic scale, , obtained from the angular two-point correlation function calculation for Luminous Red Galaxies of…
The role of fluctuation-dissipation dynamics in setting initial conditions for inflation
Mar Bastero-Gil, Arjun Berera, Robert Brandenberger +3
We study the problem of initial conditions for slow-roll inflation along a plateau-like scalar potential within the framework of fluctuation-dissipation dynamics. We consider, in p…
Warm inflation dissipative effects: predictions and constraints from the Planck data
Micol Benetti, Rudnei O. Ramos
We explore the warm inflation scenario theoretical predictions looking at two different dissipative regimes for several representative primordial potentials. As it is well known, t…
Eternal inflation in a dissipative and radiation environment: Heated demise of eternity
Gustavo S. Vicente, Leandro A. da Silva, Rudnei O. Ramos
Eternal inflation is studied in the context of warm inflation. We focus on different tools to analyze the effects of dissipation and the presence of a thermal radiation bath on the…
Photometric redshifts and clustering of emission line galaxies selected jointly by DES and eBOSS
S. Jouvel, T. Delubac, J. Comparat +65
We present the results of the first test plates of the extended Baryon Oscillation Spectroscopic Survey. This paper focuses on the emission line galaxies (ELG) population targetted…