37 citations · 143 across the 7 of their papers we have counts for
7 papers
Tensionless Strings and Supersymmetric Sigma Models: Aspects of the Target Space Geometry
Andreas Bredthauer
In this thesis, two aspects of string theory are discussed, tensionless strings and supersymmetric sigma models. The equivalent to a massless particle in string theory is a tension…
Generalized Hyperkaehler Geometry and Supersymmetry
Andreas Bredthauer
We propose the definition of (twisted) generalized hyperkaehler geometry and its relation to supersymmetric non-linear sigma models. We also construct the corresponding twistor spa…
Generalized Kahler Geometry from supersymmetric sigma models
Andreas Bredthauer, Ulf Lindstrom, Jonas Persson +1
We give a physical derivation of generalized Kahler geometry. Starting from a supersymmetric nonlinear sigma model, we rederive and explain the results of Gualtieri regarding the e…
First-order supersymmetric sigma models and target space geometry
Andreas Bredthauer, Ulf Lindstrom, Jonas Persson
We study the conditions under which N=(1,1) generalized sigma models support an extension to N=(2,2). The enhanced supersymmetry is related to the target space complex geometry. Co…
Type IIB tensionless superstrings in a pp-wave background
Andreas Bredthauer, Ulf Lindstrom, Jonas Persson +1
We solve the tensionless string in a constant plane wave background and obtain a hugely degenerate spectrum. This is the case for a large class of plane wave backgrounds. We show t…
Boundary States and Symplectic Fermions
Andreas Bredthauer
We investigate the set of boundary states in the symplectic fermion description of the logarithmic conformal field theory with central charge c=-2. We show that the thus constructe…