11,456 research outputs found
K\"ahlerian Effective Potentials for Chern-Simons-Matter Theories
In this paper, we will calculate the effective potential for a theory of
multiple M2-branes. As the theory of multiple M2-branes can be described by a
Chern-Simons-matter theory, this will be done by calculating the K\"ahlerian
effective potential for a Chern-Simons-matter theory. This calculation will be
performed in superspace formalism. We will initially study an
Abelian Chern-Simons-matter theory, and then generalize those results to the
full non-Abelian Chern-Simons-matter theory. We will obtain explicit
expressions for the superpropagators for this theory. These superpropagators
will be used to calculate the one-loop effective potential.Comment: 15 page
Nonlocal Teleparallel Cosmology
Even though it is not possible to differentiate General Relativity from
Teleparallel Gravity using classical experiments, it could be possible to
discriminate between them by quantum gravitational effects. These effects have
motivated the introduction of nonlocal deformations of General Relativity, and
similar effects are also expected to occur in Teleparallel Gravity. Here, we
study nonlocal deformations of Teleparallel Gravity along with its cosmological
solutions. We observe that Nonlocal Teleparallel Gravity (like nonlocal General
Relativity) is consistent with the present cosmological data obtained by SNe Ia
+ BAO + CC + observations. Along this track, future experiments probing
nonlocal effects could be used to test whether General Relativity or
Teleparallel Gravity give the most consistent picture of gravitational
interaction.Comment: Accepted for publication in EPJC. Some small changes and references
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Girls in IT: How to develop talent and leverage support
The objectives of this panel are to inform the audience about national and regional initiatives developed by the National Center for Women & Information Technology (NCWIT) to reach out to middle and high school girls; learn from promising experiences in which the panelists have been directly involved; and discuss venues to scale and sustain efforts to increase women\u27s participation in technology careers. Panelists will describe their particular experiences, and discuss ways to utilize the Aspirations in Computing program to increase enrollment and retention of females in computing. A minimum of 30 minutes will be set aside for question and answer
La serie estratigráfica de Navalperal. Serie tipo del Mesozoico Prebético en la región de Orcera-Siles (Provincia de Jaén)
In the Orcera-Siles area the type series is established for the Mesozoic of the Prebetic Realm, by describing the lithofacies and biofacies present in the different levels. It comprises terms from the Liassic up to the Senonian. Several lacunas are pointed out
Unstable Disk Galaxies. I. Modal Properties
I utilize the Petrov-Galerkin formulation and develop a new method for
solving the unsteady collisionless Boltzmann equation in both the linear and
nonlinear regimes. In the first order approximation, the method reduces to a
linear eigenvalue problem which is solved using standard numerical methods. I
apply the method to the dynamics of a model stellar disk which is embedded in
the field of a soft-centered logarithmic potential. The outcome is the full
spectrum of eigenfrequencies and their conjugate normal modes for prescribed
azimuthal wavenumbers. The results show that the fundamental bar mode is
isolated in the frequency space while spiral modes belong to discrete families
that bifurcate from the continuous family of van Kampen modes. The population
of spiral modes in the bifurcating family increases by cooling the disk and
declines by increasing the fraction of dark to luminous matter. It is shown
that the variety of unstable modes is controlled by the shape of the dark
matter density profile.Comment: Accepted for publication in The Astrophysical Journa
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