6 papers · 1 filter
Gauging the Wess-Zumino term of a sigma model with boundary
José Figueroa-O'Farrill, Noureddine Mohammedi
We investigate the gauging of the Wess-Zumino term of a sigma model with boundary. We derive a set of obstructions to gauging and we interpret them as the conditions for the Wess-Z…
Non-Abelian T-duality in Pre-Big-Bang Cosmology
A. Bossard, N. Mohammedi
We study the impact of non-Abelian T-duality transformations on a string based cosmological model. The implementation of the pre-big-bang scenario is investigated. We found a regio…
New duality transformation in two-dimensional non-linear sigma models
N. Mohammedi
A new T-duality transformation is found in two-dimensional non-linear sigma models. This is a straightforward generalisation of Abelian and non-Abelian T-dualities.
On the Eleventh Dimension of String Theory
Noureddine Mohammedi
An explanation of the origin of the hidden eleventh dimension in string theory is given. It is shown that any two sigma models describing the propagation of string backgrounds are…
Classical Duality in Gauge Theories
Noureddine Mohammedi
A dual action is obtained for a general non-abelian and non-supersymmetric gauge theory at the classical level. The construction follows steps similar to those used in pure abelian…
A Dual Description of the Four Dimensional Non-Linear Sigma Model
N. Mohammedi, R. T. Moss, R. D. Simmons
The dual of the four dimensional non-linear sigma model is constructed using techniques familiar to string theory. This construction necessitates the introduction of a rank two ant…