30,345 research outputs found
On the Geometry of Sculpting-like Gauging Processes
Recently, a new gauging procedure called Sculpting mechanism was proposed to
obtain the M-theory origin of type II gauged Supergravity theories in 9D. We
study this procedurein detail and give a better understanding of the different
deformations and changes in fiber bundles, that are able to generate new
relevant physical gauge symmetries in the theory. We discuss the geometry
involved in the standard approach (Noether-like) and in the new Scultping-like
one and comment on possible new applications.Comment: 9 pages, latex, Notation and typos reviewed, more clear explanations,
results unchange
Optical fibers to measure temperature vertical profile at sea
The paper is focus in the use the optical fiber to measure the temperature
in various heigh at the same time to get a temperature vertical variation. The
temperature measurements are puntual while the Bragg gratings located in the
fiber.Peer Reviewe
On the Spectral properties of Multi-branes, M2 and M5 branes
In this note we summarize some of the properties found in several papers. We
characterize spectral properties of the quantum mechanical hamiltonian of
theories with fermionic degrees of freedom beyond semiclassical approximation.
We obtain a general class of bosonic polynomial potentials for which the
Schr\"oedinger operator has a discrete spectrum. This class includes all the
scalar potentials in membrane, 5-brane, p-branes, multiple M2 branes, BLG and
ABJM theories. We also give a sufficient condition for discreteness of the
spectrum for supersymmmetric and non supersymmetric theories with a fermionic
contribution. We characterize then the spectral properties of different
theories: the BMN matrix model, the supermembrane with central charges and a
bound state of D2 with D0. We show that, while the first two models
have a purely discrete spectrum with finite multiplicity, the latter has a
continuous spectrum starting from a constant given in terms of the monopole
charge.Comment: 10pg, Latex, Contributions to the Conference XVI European Workshop on
String Theory 2010, Madrid June 14-18, 201
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