21 citations · 42 across the 9 of their papers we have counts for
9 papers
The appearance of non trivial torsion for some Ricci dependent theories in the Palatini formalism
Juliana Osorio Morales, Osvaldo Santillán
As is known from studies of gravity models in the Palatini formalism, there exist two inequivalent definitions of the generalized Ricci tensor in terms of the generalized curvature…
Some comments about emission channels of non abelian vortices
Osvaldo P. Santillán
As is well established, several gauge theories admit vortices whose mean life time is very large. In some cases, this stability is a consequence of the topology of the symmetry gro…
Neutrino emission and initial evolution of axionic quark nuggets
O. Santillán, A. Morano
The axion quark nuggets introduced in \cite{zhitnitsky}-\cite{zhitnitsky13} are a candidate for cold dark matter which, in addition, may be relevant in baryogenesis scenarios. The…
Emergent Universe as an interaction in the dark sector
Emiliano Marachlian, Iván E. Sánchez G., Osvaldo P. Santillán
A cosmological scenario where dark matter interacts with a variable vacuum energy for a spatially flat Friedmann-Robertson-Walker space-time is proposed and analysed to show that w…
Zak Phase in Discrete-Time Quantum Walks
G. Puentes, O. Santillán
We report on a simple scheme that may present a non-trivial geometric Zak phase () structure, which is based on a discrete-time quantum walk architecture. By detecting the…
Double Higgs mechanisms, supermassive stable particles and the vacuum energy
Osvaldo P. Santillán, Luciano Gabbanelli
In the present work it is shown that some specific double Higgs like mechanisms may have interesting cosmological applications. A hidden scenario which cast long lived super heavy…
Aspects of electrostatics in BTZ geometries
Y. Herrera, V. Hurovich, O. Santillán +1
In the present paper the electrostatic of charges in non rotating BTZ black hole and wormhole space times is studied. In particular, the self force of a point charge in the geometr…
Probing global aspects of a geometry by the self-force on a charge: Spherical thin-shell wormholes
E. Rubín de Celis, O. P. Santillán, C. Simeone
The self-interaction for a static point charge in the space-time of a thin-shell wormhole constructed connecting two identical Schwarzschild geometries is calculated in a series ex…
Probing global aspects of a geometry by the self-force on a charge; cylindical thin-shell wormholes
E. Rubín de Celis, O. P. Santillán, C. Simeone
We obtain the self-interaction for a point charge in the space-time of a cylindrical thin-shell wormhole connecting two identical locally flat geometries with a constant deficit an…