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A ten-dimensional action for non-geometric fluxes
ten-dimensional action non-geometric fluxes High Energy Physics - Theory
2011/7/28
Abstract: The NSNS Lagrangian of ten-dimensional supergravity is rewritten via a change of field variables inspired by Generalized Complex Geometry. We obtain a new metric and dilaton, together with a...
Non-geometric Fluxes, Asymmetric Strings and Nonassociative Geometry
Non-geometric Fluxes Asymmetric Strings Nonassociative Geometry
2011/7/27
Abstract: We study closed bosonic strings propagating both in a flat background with constant H-flux and in its T-dual configurations. We define a conformal field theory capturing linear effects in th...
Optimal and hysteretic fluxes in alloy solidification: Variational principles and chimney spacing
alloy solidification Variational principles chimney spacing
2010/11/16
We take a numerical approach to analyze the mechanisms controlling the spacing of chimneys -- channels devoid of solid -- in two-dimensional mushy layers formed by solidifying a binary alloy. Chimneys...
Scattering on two Aharonov-Bohm vortices with opposite fluxes
Aharonov-Bohm vortices opposite fluxes
2010/4/2
The scattering of an incident plane wave on two Aharonov-Bohm vortices with opposite fluxes is considered in detail. The presence of the vortices imposes non-trivial boundary conditions for the partia...
Methods of K¡theory and spectral theory of Dirac operators are applied to describe the Chern isomorphisms and quantum fields on branes on hyperbolic manifolds.