Buscar
Mostrando ítems 51-60 de 2230
On singularly perturbed Filippov systems
(Cambridge University Press, 2013-12-01)
In this paper, we study singularly perturbed Filippov systems. More specifically, our main question is to know how the dynamics of Filippov systems is affected by singular perturbations. We extend the Fenichel theory ...
Generic bifurcations of planar filippov systems via geometric singular perturbations
(2011-01-01)
In this paper we deal with non-smooth vector fields on the plane. We prove that the analysis of their local behavior around certain typical singularities can be treated via singular perturbation theory. In fact, after a ...
Decay of accelerated protons and the existence of the Fulling-Davies-Unruh effect
(2001-10-08)
A theoretic-oriented strategy was taken to address the weak decay of uniformly accelerated protons. The decay of uniformly accelerated p+'s was analyzed using standard quantum field theory (QFT). It was shown that the FDU ...
The causal approach proof for the equivalence of SDKP4 and SQED4 at tree-level
(2020-03-30)
The description of the electromagnetic interaction of charged spinless particles is usually formulated by the Scalar Quantum Electrodynamics. However, there is an alternative formulation given by the Duffin-Kemmer-Petiau ...
Subharmonic bifurcations near infinity
(2004-12-01)
In this paper are considered periodic perturbations, depending on two parameters, of planar polynomial vector fields having an annulus of large amplitude periodic orbits, which accumulate on a symmetric infinite heteroclinic ...
Untangling features in the primordial spectra
(IOP, 2015)
We discuss the possible existence of features in both the primordial power
spectrum and bispectrum generated during a stage of single eld cosmic in
ation. We argue
that there are two main classes of features: those ...
Shapes and features of the primordial dispectrum
(IOP Publishing Ltd., 2017)
If time-dependent disruptions from slow-roll occur during inflation, the correlation functions of the primordial curvature perturbation should have scale-dependent features, a case which is marginally supported from the ...
Consistently violating the non-Gaussian consistency relation
(IOP Press, 2015)
Non-attractor models of inflation are characterized by the super-horizon evolution of curvature perturbations, introducing a violation of the non-Gaussian consistency relation between the bispectrum's squeezed limit and ...
On Exact Solutions and Perturbative Schemes in Higher Spin Theory
(2018)
We review various methods for finding exact solutions of higher spin theory in four dimensions, and survey the known exact solutions of (non) minimal Vasiliev's equations. These include instanton-like and black hole-like ...