Zobrazeno 1 - 10
of 112
pro vyhledávání: '"Falciano, F"'
Screening mechanisms are often deployed by dark energy models in order to conceal the effects of their new degrees of freedom from the scrutiny of terrestrial and solar system experiments. However, extreme properties of nuclear matter may lead to a p
Externí odkaz:
http://arxiv.org/abs/2112.03823
Publikováno v:
Phys. Rev. D 103, 084046 (2021)
We study the validity of Bekenstein's entropy bound for a charged black hole in the context of nonlinear electrodynamics. Bekenstein's inequalities are commonly understood as universal relations between the entropy, the charge, the momentum, and the
Externí odkaz:
http://arxiv.org/abs/2103.14109
Autor:
Guimarães, L. F., Falciano, F. T.
Publikováno v:
Phys. Rev. D 103, 063530 (2021)
We show how to build a curvaton inflationary model motivated by scale-dependent non-Gaussianities of cosmological perturbations. In particular, we study the change of sign in the $f_{NL}$ parameter as a function of the curvaton field value at horizon
Externí odkaz:
http://arxiv.org/abs/2011.13888
Autor:
Nicacio, F., Falciano, F. T.
Publikováno v:
Phys. Rev. A 101, 052105 (2020)
In this work we determine a lower bound to the mean value of the quantum potential for an arbitrary state. Furthermore, we derive a generalized uncertainty relation that is stronger than the Robertson-Schr\"odinger inequality and hence also stronger
Externí odkaz:
http://arxiv.org/abs/2002.01507
Publikováno v:
Phys. Rev. D 100, 125008 (2019)
Bekenstein's inequality sets a bound on the entropy of a charged macroscopic body. Such a bound is understood as a universal relation between physical quantities and fundamental constants of nature that should be valid for any physical system. We rea
Externí odkaz:
http://arxiv.org/abs/1911.08467
In general, to avoid a singularity in cosmological models involves the introduction of exotic kind of matter fields, for example, a scalar field with negative energy density. In order to have a bouncing solution in classical General Relativity, viola
Externí odkaz:
http://arxiv.org/abs/1908.04258
Publikováno v:
Phys. Rev. D 99, 103515 (2019)
In this paper we construct a bounce model that mimics the Starobinsky inflationary model. Our construction relies on Wands' duality, which shows that the Mukhanov-Sasaki equation has a symmetry transformation by changing appropriately its time-depend
Externí odkaz:
http://arxiv.org/abs/1902.05031
Generally the Brans-Dicke theory reduces to General Relativity in the limit $\omega\rightarrow\infty$ if the scalar field goes as $\phi\propto1/\omega$. However, it is also known that there are examples with $\phi\propto1/\sqrt{\omega}$ that does not
Externí odkaz:
http://arxiv.org/abs/1810.07860
Publikováno v:
Physical Review D98 (2018), no.4, 044027
We study the formation of classical singularities in Generalized Brans-Dicke theories that are natural extensions to Brans-Dicke where the kinetic term is modified by a new coupling function $\omega(\varphi)$. We discuss the asymptotic limit $\omega(
Externí odkaz:
http://arxiv.org/abs/1808.03694
Autor:
Peñafiel, M. L., Falciano, F. T.
Bekenstein and Mayo proposed a generalised bound for the entropy, which implies some inequalities between the charge, energy, angular momentum, and the size of the macroscopic system. Dain has shown that Maxwell's electrodynamics satisfies all three
Externí odkaz:
http://arxiv.org/abs/1712.02296