9,197 research outputs found
Bounds on topological Abelian string-vortex and string-cigar from information-entropic measure
In this work we obtain bounds on the topological Abelian string-vortex and on
the string-cigar, by using a new measure of configurational complexity, known
as configurational entropy. In this way, the information-theoretical measure of
six-dimensional braneworlds scenarios are capable to probe situations where the
parameters responsible for the brane thickness are arbitrary. The so-called
configurational entropy (CE) selects the best value of the parameter in the
model. This is accomplished by minimizing the CE, namely, by selecting the most
appropriate parameters in the model that correspond to the most organized
system, based upon the Shannon information theory. This information-theoretical
measure of complexity provides a complementary perspective to situations where
strictly energy-based arguments are inconclusive. We show that the higher the
energy the higher the CE, what shows an important correlation between the
energy of the a localized field configuration and its associated entropic
measure.Comment: 6 pages, 7 figures, final version to appear in Phys. Lett.
Remarkable magnetostructural coupling around the magnetic transition in CeCoFeSi
We report a detailed study of the magnetic properties of
CeCoFeSi under high magnetic fields (up to 16 Tesla)
measuring different physical properties such as specific heat, magnetization,
electrical resistivity, thermal expansion and magnetostriction.
CeCoFeSi becomes antiferromagnetic at 6.7 K.
However, a broad tail (onset at 13 K) in the specific heat
precedes that second order transition. This tail is also observed in the
temperature derivative of the resistivity. However, it is particularly
noticeable in the thermal expansion coefficient where it takes the form of a
large bump centered at . A high magnetic field practically washes out that
tail in the resistivity. But surprisingly, the bump in the thermal expansion
becomes a well pronounced peak fully split from the magnetic transition at
. Concurrently, the magnetoresistance also switches from negative to
positive just below . The magnetostriction is considerable and
irreversible at low temperature (
410 at 2 K) when the magnetic interactions dominate. A broad
jump in the field dependence of the magnetostriction observed at low may be
the signature of a weak ongoing metamagnetic transition. Taking altogether, the
results indicate the importance of the lattice effects in the development of
the magnetic order in these alloys.Comment: 5 pages, 6 figure
Asymptotic Bethe equations for open boundaries in planar AdS/CFT
We solve, by means of a nested coordinate Bethe ansatz, the open-boundaries
scattering theory describing the excitations of a free open string propagating
in , carrying large angular momentum , and ending on
a maximal giant graviton whose angular momentum is in the same plane. We thus
obtain the all-loop Bethe equations describing the spectrum, for finite but
large, of the energies of such strings, or equivalently, on the gauge side of
the AdS/CFT correspondence, the anomalous dimensions of certain operators built
using the epsilon tensor of SU(N). We also give the Bethe equations for strings
ending on a probe D7-brane, corresponding to meson-like operators in an
gauge theory with fundamental matter.Comment: 30 pages. v2: minor changes and discussion section added, J.Phys.A
version
Impacts of natural forest landslides in a rural community of Morretes, PR-Brazil.
Edição dos abstracts do 24º IUFRO World Congress, 2014, Salt Lake City. Sustaining forests, sustaining people: the role of research
Avaliação da qualidade pós-colheita de morangos embalados com embalagem com nanopartÃcula de prata.
Entrada padronizada CORREA, D. S
Análise de grupos de experimentos de milho, quanto a ordem de classificação de cultivares, em diferentes locais da região Centro-Oeste do Brasil.
Two-phase free boundary problems for a class of fully nonlinear double-divergence systems
In this article, we study a class of fully nonlinear double-divergence
systems with free boundaries associated with a minimization problem. The
variational structure of Hessian-dependent functional plays a fundamental role
in proving the existence of the minimizers and then the existence of the
solutions for the system. In addition, we establish gains of the integrability
for the double-divergence equation. Consequently, we improve the regularity for
the fully nonlinear equation in Sobolev and H\"older spaces.Comment: 17 pages, 1 figur
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