Zobrazeno 1 - 10
of 37
pro vyhledávání: '"F. P. Devecchi"'
Publikováno v:
Trends in Computational and Applied Mathematics, Vol 24, Iss 4 (2023)
In 2019, more than 90% of the world’s population was living in places where pollutant concentrations exceeded the air-quality guidelines. Anthropogenic activity has been the main cause of climate change in the last 20 years, especially in urban cen
Externí odkaz:
https://doaj.org/article/98cc302776544bf39f93b92f40d92145
Publikováno v:
Physical Review D. 105
Publikováno v:
Brazilian Journal of Physics. 49:583-586
In this work, we explore a one-dimensional universe, a toy model based on the relativistic particle theory, seen as a one-dimensional field theory coupled to gravity. The gravitational field is represented by an einbein. Working in a cosmological con
Publikováno v:
International Journal of Modern Physics A. 36:2150103
We present a model of an early universe where the sources of gravitational effects are a scalar field, a relativistic fluid based on Schutz’s model and a self-interacting fermionic field. From the classical analysis based on the Hamiltonian formali
Publikováno v:
International Journal of Modern Physics A. 35:2050133
A cosmological model for the early universe is investigated where a Schutz fluid and a fermionic field coupled to a gauge field are the sources of the gravitational field. The determination of the scale factor in the classical analysis follows from t
Publikováno v:
International Journal of Modern Physics A. 35:2050044
In this work we consider the scale-covariant formalism proposed by Canuto et al.,[Formula: see text] in order to map different eras of the universe. This technique considers a scale gauge function that can be adjusted by using different arguments lik
Publikováno v:
Modern Physics Letters A. 34:1950271
A model for an anisotropic pre-inflationary universe described by the Bianchi type-I metric is developed. A relativistic fluid of the Schutz formalism and a self-interacting fermionic field are considered as sources of the gravitational field. The cl
Publikováno v:
Modern Physics Letters A. 32:1750220
In this work, a model for the pre-inflationary universe is developed where the sources of the gravitational field are a relativistic fluid and a self-interacting fermionic field. The inclusion of the relativistic fluid is based on Schutz’s model. F
In this work we investigate a model for the early Universe in a Bianchi type-I metric, where the sources of the gravitational field are a fermionic and a bosonic field, interacting through a Yukawa potential, following the standard model of elementar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce2f81816f1fe8c6135cb0f8b09b8dea
http://arxiv.org/abs/1510.01345
http://arxiv.org/abs/1510.01345
Autor:
F. P. Devecchi, M. L. Froehlich
Publikováno v:
Modern Physics Letters A. 21:445-450
By the inclusion of an additional term, non-linear in the scalar curvature $R$, it is tested if dark energy could rise as a geometrical effect in 3D gravitational formulations. We investigate a cosmological fluid obeying a non-polytropic equation of