14,955 research outputs found
On Matrix Superpotential and Three-Component Normal Modes
We consider the supersymmetric quantum mechanics (SUSY QM) with three-
component normal modes for the Bogomol'nyi-Prasad-Sommerfield (BPS) states. An
explicit form of the SUSY QM matrix superpotential is presented and the
corresponding three-component bosonic zero-mode eigenfunction is investigated.Comment: 17 pages, no figure. Paper accepted for publication in Journal of
Physics A: Mathematical and Theoretica
On the Temperley-Lieb reflection matrices
This work concerns the boundary integrability of the spin-s
Temperley-Lieb model. A systematic computation method is
used to constructed the solutions of the boundary Yang-Baxter equations. For
half-integer, a general free parameter solution is presented.
It turns that for integer, the general solution has free
parameters. Moreover, some particular solutions are discussed.Comment: LaTex 17 page
A pilot study on canonical gravity with mass dimension one fermions
The mass dimension one (MDO) fermionic field is built on a complete set of
dual-helicity eigenspinors of the charge conjugation operator, which obeys the
statistic of Fermi-Dirac. These spinors are a potential candidate for the
description of dark matter. The redefinition of the dual structure of this
object holds a local adjacent theory and satisfies complete Lorentz invariance.
In this work, we investigate important aspects of the interaction of this
fermion with gravity in the light of a canonical formulation in ADM formalism.
We construct an action via tetrad fields using a manifold on a family of
space-like surfaces that carries the MDO matter field, and
additionally we propose a condition for the action to have a term associated
with dark energy. We found the Hamiltonian and diffeomorphism constraints at
the classical level for gravitational dynamics with the immersion of this
material content in space-time, which leads us to the interpretation of the
contribution of dark matter energy density, parallel to the lapse function of
foliation and its directional flux of energy density in the hypersurface of
manifold.Comment: Larevtex4, 12 pages with 0 figure
Qualidade da uva Isabel precoce em sexto ciclo produtivo sobre diferentes porta-enxertos no Submédio do Vale do São Francisco.
O objetivo deste estudo foi avaliar a qualidade das uvas Isabel Precoce cultivadas sobre diferentes porta-enxertos em sexto ciclo produtivo, no Submédio do Vale do São Francisco
Cosmological inflation driven by a scalar torsion function
A viable model for inflation driven by a torsion function in a Friedmann
background is presented. The scalar spectral index in the interval
is obtained in order to satisfy the initial
conditions for inflation. The post inflationary phase is also studied, and the
analytical solutions obtained for scale factor and energy density generalizes
that ones for a matter dominated universe, indicating just a small deviation
from the standard model evolution. The same kind of torsion function used also
describes satisfactorily the recent acceleration of the universe, which could
indicate a possible unification of different phases, apart form specific
constants.Comment: 8 pages, 2 figures, submitted to EPJ
The role of pressure anisotropy in the turbulent intracluster medium
In low-density plasma environments, such as the intracluster medium (ICM),
the Larmour frequency is much larger than the ion-ion collision frequency. In
such a case, the thermal pressure becomes anisotropic with respect to the
magnetic field orientation and the evolution of the turbulent gas is more
correctly described by a kinetic approach. A possible description of these
collisionless scenarios is given by the so-called kinetic magnetohydrodynamic
(KMHD) formalism, in which particles freely stream along the field lines, while
moving with the field lines in the perpendicular direction. In this way a
fluid-like behavior in the perpendicular plane is restored. In this work, we
study fast growing magnetic fluctuations in the smallest scales which operate
in the collisionless plasma that fills the ICM. In particular, we focus on the
impact of a particular evolution of the pressure anisotropy and its
implications for the turbulent dynamics of observables under the conditions
prevailing in the ICM. We present results from numerical simulations and
compare the results which those obtained using an MHD formalism.Comment: 7 pages, 14 figures, Journal of Physics: Conference Serie
Influência de posições das cápsulas na planta sobre a qualidade das sementes de gergelim.
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