Zobrazeno 1 - 10
of 537
pro vyhledávání: '"Sá, Paulo"'
In this article, we investigate a coupled phantom dark-energy cosmological model in which the coupling term between a phantom scalar field with an exponential potential and a pressureless dark-matter fluid is motivated by the warm inflationary paradi
Externí odkaz:
http://arxiv.org/abs/2407.15804
Publikováno v:
Universe 2024, 10(7), 271
In this work, we discuss the de Sitter swampland conjectures in the context of the generalized Chaplygin-inspired inflationary model. We demonstrate that these conjectures can be satisfied, but only in the region of the parameter space far away from
Externí odkaz:
http://arxiv.org/abs/2402.19051
Autor:
Sá, Paulo M.
Publikováno v:
Universe 2024, 10(8), 324
We investigate a coupled quintessence cosmological model in which a dark-energy scalar field with an exponential potential interacts directly with a dark-matter fluid through a dissipative term inspired by warm inflation. The evolution equations of t
Externí odkaz:
http://arxiv.org/abs/2312.09171
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 be reconciled with the swampland conjectures about the emergence of de
Externí odkaz:
http://arxiv.org/abs/2301.02109
Publikováno v:
In Biochemical Pharmacology January 2025 231
Autor:
Bertolami, Orfeu, Sá, Paulo M.
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 emergence of de Sitter solutions in string theory. We find that under quite ge
Externí odkaz:
http://arxiv.org/abs/2204.13794
Autor:
Pagano, Tiago Palma, Ortega, Lucas Lemos, Santos, Victor Rocha, Bonfim, Yasmin da Silva, Paranhos, José Vinícius Dantas, Sá, Paulo Henrique Miranda, Nascimento, Lian Filipe Santana, Winkler, Ingrid, Nascimento, Erick Giovani Sperandio
Estimating heart rate is important for monitoring users in various situations. Estimates based on facial videos are increasingly being researched because it makes it possible to monitor cardiac information in a non-invasive way and because the device
Externí odkaz:
http://arxiv.org/abs/2202.08913
Autor:
Sá, Paulo M.1,2 pmsa@ualg.pt
Publikováno v:
Universe (2218-1997). Aug2024, Vol. 10 Issue 8, p324. 13p.
Autor:
Potting, Robertus, Sá, Paulo M.
We investigate a cosmological model in which dark energy, represented by a quintessential scalar field, is directly coupled to a dark-matter perfect fluid. We are interested in solutions of cosmological relevance, namely those for which a dark-matter
Externí odkaz:
http://arxiv.org/abs/2112.07608
Autor:
Sá, Paulo Sérgio Salla
objetivo deste trabalho é o desenvolvimento de um software: o Gerador Automático de Arquivo Html de Ajuda (GAAHA) para a geração de arquivos de indexação e ajuda em HTML baseado na análise automática de documentos. Esses arquivos de indexaç