Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Edésio M. Barboza"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 4, Pp 1-8 (2019)
Abstract It is well known that, in the context of general relativity, an unknown kind of matter that must violate the strong energy condition is required to explain the current accelerated phase of expansion of the Universe. This unknown component is
Externí odkaz:
https://doaj.org/article/870e557bdae04d258f62adf6fb9e0c65
Publikováno v:
Physics Letters B, Vol 798, Iss , Pp - (2019)
It is argued that, using the black hole area entropy law together with the Boltzmann-Gibbs statistical mechanics and the quasinormal modes of the black holes, it is possible to determine univocally the lowest possible value for the spin j in the cont
Externí odkaz:
https://doaj.org/article/c2855e68b06a456990041803cd249c38
Autor:
Edésio M. Barboza
Publikováno v:
Universe, Vol 4, Iss 2, p 39 (2018)
In this paper, we present a method to probe the vacuum decay hypothesis by searching for deviations of the uncoupled dark matter density evolution formula. The method consists of expanding the dark matter density in a Taylor series and then comparing
Externí odkaz:
https://doaj.org/article/97d1520d9a9e4e039b53c692583f6992
Publikováno v:
Gravitation and Cosmology. 27:1-10
We use the canonical formalism of classical mechanics together with the first law of thermodynamics to unveil a differential equation for a minimally coupled canonical scalar field which should be solved simultaneously with the Klein–Gordon equatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11c70f216ae2cbc7175a0520f61ea6b3
https://doi.org/10.1134/s0202289321010023
https://doi.org/10.1134/s0202289321010023
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 4, Pp 1-8 (2019)
European Physical Journal
European Physical Journal
It is well known that, in the context of general relativity, an unknown kind of matter that must violate the strong energy condition is required to explain the current accelerated phase of expansion of the Universe. This unknown component is called d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b3b7d906191dba3b91c6c0797cd1fd80
http://link.springer.com/article/10.1140/epjc/s10052-019-6876-3
http://link.springer.com/article/10.1140/epjc/s10052-019-6876-3
The Barrow entropy appears from the fact that the black hole surface can be modified due to quantum gravitational outcome. The measure of this perturbation is given by a new exponent $\Delta$. In this letter we have shown that, from the standard math
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::daef43901ad80738fffe0bf358773ca9
http://arxiv.org/abs/2005.11609
http://arxiv.org/abs/2005.11609
Autor:
Bráulio B. Soares, Albert C. R. Mendes, Edésio M. Barboza, Everton M. C. Abreu, Jorge Ananias Neto
In this Letter we have shown that, from the standard thermodynamic functions, the mathematical form of an equipartition theorem may be related to the algebraic expression of a particular entropy initially chosen to describe the black hole thermodynam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2ac762eb248e51f9d31ea67c89d7b42
Publikováno v:
Physical Review D. 100
Fluctuations can be incorporated into an equilibrium statistical mechanics setting through a superposition of different statistics, i.e., superstatistics. Herein, we have combined equipartition theorems arising out of superstatistics together with th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11663fe24f24145b3a2216457feec732
https://doi.org/10.1103/physrevd.100.103516
https://doi.org/10.1103/physrevd.100.103516
Publikováno v:
Physics Letters
Physics Letters B, Vol 798, Iss, Pp-(2019)
Physics Letters B, Vol 798, Iss, Pp-(2019)
It is argued that, using the black hole area entropy law together with the Boltzmann-Gibbs statistical mechanics and the quasinormal modes of the black holes, it is possible to determine univocally the lowest possible value for the spin $j$ in the co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41f6c15551a21a17eb31fbf2cc0f27c5
http://repo.scoap3.org/api
http://repo.scoap3.org/api
Decoupling redshift: The key to conciliate global and local estimates of the Universe expansion rate
Publikováno v:
Europhysics Letters. 133:69002
To explain the discrepancy between the local and the global estimates of the Universe expansion rate, H 0, becomes one of the most challenging problems in contemporary cosmology. Underestimated systematic errors as well as new physics beyond the stan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::151af03167351b2c9b5e7c8171e0c9cd
https://doi.org/10.1209/0295-5075/133/69002
https://doi.org/10.1209/0295-5075/133/69002