Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Roldão da Rocha"'
Autor:
Roldão da Rocha, Anderson A. Tomaz
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 9, Pp 1-12 (2020)
Abstract The holographic entanglement entropy (HEE) is investigated for a black hole under the minimal geometric deformation (MGD) procedure, created by gravitational decoupling via an anisotropic fluid, in an AdS/CFT on the brane setup. The respecti
Externí odkaz:
https://doaj.org/article/f43f9abd003b48a68cf8ae3eafeb2772
Autor:
Iberê Kuntz, Roldão da Rocha
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 5, Pp 1-10 (2020)
Abstract The Hawking radiation of static, spherically symmetric, asymptotically flat solutions in quadratic gravity is here scrutinized, in the context of the generalized uncertainty principle (GUP). Near-center and near-horizon Frobenius expansions
Externí odkaz:
https://doaj.org/article/1ab2e2165cc741aea0363db875eb9b22
Autor:
Iberê Kuntz, Roldão da Rocha
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 6, Pp 1-6 (2019)
Abstract We show that quantum gravity yields exponentially growing gravitational waves. Without a mechanism to stop these modes from growing, the universe would go through a gravitational collapse. For Minkowski background, we propose a solution by c
Externí odkaz:
https://doaj.org/article/8404704c6c9c49d28317899428426274
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 3, Pp 1-7 (2019)
Abstract Dirac linear spinor fields were obtained from non-linear Heisenberg spinors, in the literature. Here we extend that idea by considering not only Dirac spinor fields but spinor fields in any of the Lounesto’s classes. When one starts consid
Externí odkaz:
https://doaj.org/article/29e442a13e294ff897641688dc4e50bc
Publikováno v:
Physics Letters B, Vol 787, Iss , Pp 16-22 (2018)
We study the dissociation of heavy vector mesons in a thermal medium from the point of view of the configurational entropy. Bottomonium and charmonium vector mesons in a plasma are represented using a holographic AdS/QCD model. The quasinormal modes,
Externí odkaz:
https://doaj.org/article/62ea8b49db4544bb9e639094bd483546
Autor:
Luca Fabbri, Roldão da Rocha
Publikováno v:
Physics Letters B, Vol 780, Iss , Pp 427-431 (2018)
A spinor fields classification with non-Abelian gauge symmetries is introduced, generalizing the U(1) gauge symmetries-based Lounesto's classification. Here, a more general classification, contrary to the Lounesto's one, encompasses spinor multiplets
Externí odkaz:
https://doaj.org/article/18d8596c31e34a059fc1b2b071627a99
Autor:
Luca Fabbri, Roldão da Rocha
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 5, Pp 1-5 (2018)
Abstract We assume a physical situation where gravity with torsion is neglected for an electrodynamically self-interacting spinor that will be taken in its rest-frame and spin-eigenstate: we demonstrate that under this circumstance no solution exists
Externí odkaz:
https://doaj.org/article/5becda0e36c3457c8267de31f607da24
Autor:
Luca Fabbri, Roldão da Rocha
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 3, Pp 1-9 (2018)
Abstract We consider propagating torsion as a completion of gravitation in order to describe the dynamics of curved-twisted space-times filled with Dirac spinorial fields; we discuss interesting relationships of the torsion axial vector and the curva
Externí odkaz:
https://doaj.org/article/1bffd8270b464396b17a56486378c6ce
Autor:
Nelson R.F. Braga, Roldão da Rocha
Publikováno v:
Physics Letters B, Vol 776, Iss C, Pp 78-83 (2018)
Bottomonium and charmonium, representing quarkonia states, are scrutinized under the point of view of the information theory, in the AdS/QCD holographic setup. A logarithmic measure of information, comprised by the configurational entropy, is here em
Externí odkaz:
https://doaj.org/article/b6cecf3caecc4001831f353c74af9b3b
Autor:
A. Goncalves da Silva, Roldão da Rocha
Publikováno v:
Physics Letters B, Vol 774, Iss C, Pp 98-102 (2017)
Solitary waves propagation of baryonic density perturbations, ruled by the Korteweg–de Vries equation in a mean-field quark–gluon plasma model, are investigated from the point of view of the theory of information. A recently proposed continuous l
Externí odkaz:
https://doaj.org/article/47db95a03410418e96b83a4601661b8e