102 citations · 280 across the 10 of their papers we have counts for
10 papers
Self-adjoint wave equations for dynamical perturbations of self-gravitating fields
O. Sarbach, M. Heusler, O. Brodbeck
It is shown that the dynamical evolution of linear perturbations on a static space-time is governed by a constrained wave equation for the extrinsic curvature tensor. The spatial p…
Dimensionally Reduced Gravity, Hermitian Symmetric Spaces and the Ashtekar Variables
Othmar Brodbeck, Marco Zagermann
Dimensional reductions of various higher dimensional (super)gravity theories lead to effectively two-dimensional field theories described by gravity coupled G/H nonlinear sigma-mod…
Perturbation theory for self-gravitating gauge fields I: The odd-parity sector
Olivier Sarbach, Markus Heusler, Othmar Brodbeck
A gauge and coordinate invariant perturbation theory for self-gravitating non-Abelian gauge fields is developed and used to analyze local uniqueness and linear stability properties…
Einstein's Equations with Asymptotically Stable Constraint Propagation
Othmar Brodbeck, Simonetta Frittelli, Peter Huebner +1
We introduce a proposal to modify Einstein's equations by embedding them in a larger symmetric hyperbolic system. The additional dynamical variables of the modified system are esse…
Stationary perturbations and infinitesimal rotations of static Einstein-Yang-Mills configurations with bosonic matter
Othmar Brodbeck, Markus Heusler
Using the Kaluza-Klein structure of stationary spacetimes, a framework for analyzing stationary perturbations of static Einstein-Yang-Mills configurations with bosonic matter field…
Zero Modes of the Dirac Operator for regular Einstein-Yang-Mills Background fields
Othmar Brodbeck, Norbert Straumann
The existence of normalizable zero modes of the twisted Dirac operator is proven for a class of static Einstein-Yang-Mills background fields with a half-integer Chern-Simons number…