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9 papers · 2 filters
A 2D integrable axion model and Target space duality
Peter Forgacs
A review is given on the recently proposed two dimensional axion model (O(3) sigma-model with a dynamical Hopf-term) and the T-duality relating it to the SU(2)xU(1) symmetric aniso…
Exotic galilean symmetry and the Hall effect
C. Duval, P. A. Horvathy
The ``Laughlin'' picture of the Fractional Quantum Hall effect can be derived using the ``exotic'' model based on the two-fold centrally-extended planar Galilei group. When coupled…
Brane World Cosmology with Gauss-Bonnet Interaction
B. Abdesselam, N. Mohammedi
We study a Randall-Sundrum model modified by a Gauss-Bonnet interaction term. We consider, in particular, a Friedmann-Robertson-Walker metric on the brane and analyse the resulting…
Ultraviolet properties of noncommutative non-linear sigma-models in two dimensions
I. Jack, D. R. T. Jones, N. Mohammedi
We discuss the ultra-violet properties of bosonic and supersymmetric noncommutative non-linear sigma-models in two dimensions, both with and without a Wess-Zumino-Witten term.
Exotic galilean symmetry in the non-commutative plane, and the Hall effect
C. Duval, P. A. Horváthy
Quantum Mechanics in the non-commutative plane is shown to admit the ``exotic'' symmetry of the doubly-centrally-extended Galilei group. When coupled to a planar magnetic field who…
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.