Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Bamba, A."'
Publikováno v:
Physics Letters B, Vol 854, Iss , Pp 138722- (2024)
Topological arguments are currently being used as a novel scheme to discern the properties of black holes while ignoring their detailed structure and specific field equations. Among various avenues of black hole physics, where this novel approach is
Externí odkaz:
https://doaj.org/article/641af925d34c40fb8d60acb613f60930
Publikováno v:
In Physics Letters B July 2024 854
Publikováno v:
Physics Letters B, Vol 795, Iss , Pp 220-224 (2019)
We demonstrate that the linearized Einstein gravity in de Sitter (dS) spacetime besides the evident symmetries also possesses the additional (local) symmetry hμν→hμν+Eμνχ, where Eμν is a spin-two projector tensor and χ is an arbitrary con
Externí odkaz:
https://doaj.org/article/e813d241bdbe4eb8bb62350abc38aeb8
Publikováno v:
Physics Letters B, Vol 785, Iss , Pp 184-190 (2018)
We propose a new non-thermal Leptogenesis mechanism that takes place during the reheating epoch, and utilizes the Ratchet mechanism. The interplay between the oscillation of the inflaton during reheating and a scalar lepton leads to a dynamical syste
Externí odkaz:
https://doaj.org/article/f61200f3507b4e6b8c357ff5a0061e55
Publikováno v:
Physics Letters B, Vol 781, Iss , Pp 195-200 (2018)
Employing the modified entropy–area relation suggested by Tsallis and Cirto [1], and the holographic hypothesis, a new holographic dark energy (HDE) model is proposed. Considering a flat Friedmann–Robertson–Walker (FRW) universe in which there
Externí odkaz:
https://doaj.org/article/c6e5bf85abc14d71b45935291e559bbf
Publikováno v:
Physics Letters B, Vol 785, Iss , Pp 567-569 (2018)
We point out a potential relevance between the Krein–Gupta–Bleuler (KGB) vacuum leading to a fully covariant quantum field theory for gravity in de Sitter (dS) spacetime and the observable smallness of the cosmological constant. This may provide
Externí odkaz:
https://doaj.org/article/6fbbaf2a0776485282725de117cf9612
Publikováno v:
Physics Letters B, Vol 737, Iss C, Pp 374-378 (2014)
We reconstruct scalar field theories to realize inflation compatible with the BICEP2 result as well as the Planck. In particular, we examine the chaotic inflation model, natural (or axion) inflation model, and an inflationary model with a hyperbolic
Externí odkaz:
https://doaj.org/article/76b29fcda7d64406b809a3c3e89746ef
Publikováno v:
Physics Letters B, Vol 795, Iss, Pp 220-224 (2019)
Physics Letters
Physics Letters
We demonstrate that the linearized Einstein gravity in de Sitter (dS) spacetime besides the evident symmetries also possesses the additional (local) symmetry $h_{\mu\nu}\rightarrow h_{\mu\nu} + {\cal E}_{\mu\nu}\chi$, where ${\cal E}_{\mu\nu}$ is a s
Publikováno v:
Physics Letters
Physics Letters B, Vol 781, Iss, Pp 195-200 (2018)
Physics Letters B, Vol 781, Iss, Pp 195-200 (2018)
Employing the modified entropy–area relation suggested by Tsallis and Cirto [1], and the holographic hypothesis, a new holographic dark energy (HDE) model is proposed. Considering a flat Friedmann–Robertson–Walker (FRW) universe in which there
Publikováno v:
Physics Letters B, Vol 785, Iss, Pp 567-569 (2018)
Physics Letters
Physics Letters
We point out a potential relevance between the Krein-Gupta-Bleuler (KGB) vacuum leading to a fully covariant quantum field theory for gravity in de Sitter (dS) spacetime and the observable smallness of the cosmological constant. This may provide a fo