115 research outputs found
Topological vortices in generalized Born-Infeld-Higgs electrodynamics
A consistent BPS formalism to study the existence of topological axially
symmetric vortices in generalized versions of the Born-Infeld-Higgs
electrodynamics is implemented. Such a generalization modifies the field
dynamics via introduction of three non-negative functions depending only in the
Higgs field, namely, , and . A set of
first-order differential equations is attained when these functions satisfy a
constraint related to the Ampere law. Such a constraint allows to minimize the
system energy in such way that it becomes proportional to the magnetic flux.
Our results provides an enhancement of topological vortex solutions in
Born-Infeld-Higgs electrodynamics. Finally, we analyze a set of models such
that a generalized version of Maxwell-Higgs electrodynamics is recovered in a
certain limit of the theory.Comment: 8 pages, 8 figures, to appear in EPJ
Analytical BPS Maxwell-Higgs vortices
We have established a prescription for the calculation of analytical vortex
solutions in the context of generalized Maxwell-Higgs models whose overall
dynamics is controlled by two positive functions of the scalar field. We have
also determined a natural constraint between these functions and the Higgs
potential allowing the existence of axially symmetric
Bogomol'nyi-Prasad-Sommerfield (BPS) solutions possessing finite energy.
Furthermore, when the generalizing functions are chosen suitably, the
nonstandard BPS equations can be solved exactly. We have studied some examples,
comparing them with the usual Abrikosov-Nielsen-Olesen (ANO) solution. The
overall conclusion is that the analytical self-dual vortices are well-behaved
in all relevant sectors, strongly supporting the generalized models they belong
themselves. In particular, our results mimic well-known properties of the usual
(numerical) configurations, as localized energy density, while contributing to
the understanding of topological solitons and their description by means of
analytical methods.Comment: 8 pages, 4 figure
Abundância e distribuição de lianas sobre as copas de espécies arbóreas em uma floresta estacional semidecidual.
Analytical self-dual solutions in a nonstandard Yang-Mills-Higgs scenario
We have found analytical self-dual solutions within the generalized
Yang-Mills-Higgs model introduced in Phys. Rev. D 86, 085034 (2012). Such
solutions are magnetic monopoles satisfying Bogomol'nyi-Prasad-Sommerfield
(BPS) equations and usual finite energy boundary conditions. Moreover, the new
solutions are classified in two different types according to their capability
of recovering (or not) the usual 't Hooft--Polyakov monopole. Finally, we
compare the profiles of the solutions we found with the standard ones, from
which we comment about the main features exhibited by the new configurations.Comment: 6 pages, 4 figures. To be published in Physics Letters
Compactlike kinks and vortices in generalized models
This work deals with the presence of topological defects in k-field models,
where the dynamics is generalized to include higher order power in the kinetic
term. We investigate kinks in (1,1) dimensions and vortices in (2,1)
dimensions, focusing on some specific features of the solutions. In particular,
we show how the kinks and vortices change to compactlike solutions, controlled
by the parameter used to introduce the generalized models.Comment: 7 pages, 7 figures. Version to be published in PR
Estrutura e composição de espécies arbóreas na borda e interior de um fragmento florestal.
Ocorrência de lianas em um fragmento de floresta estacional semidecidual - tendência de variação borda - interior.
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