[hep-th] seminar grupe za cestice i gravitaciju

[Branislav Cvetkovic]

Postovane kolege,

u petak 08.06. u 11 h na Institutu za fiziku, u sali 300, Voja 
Radovanovic ce odrzati seminar pod naslovom "Noncommutative gravity on 
Moyal plane".
Apstrakt vam prosledjujem u prilogu.

                                            Pozdrav Branislav

Abstract

We study deformation of gravity on canonical noncommutative  spacetime. 
The starting point is the local $SO(2,3)$ symmetry on the four 
dimensional Minkowski space-time. This symmetry is  spontaneously  
broken down to  the local Lorentz symmetry. Then we deform $SO(1,3)$ 
symmetry. The construction is done perturbatively as an expansion in the 
NC parameter, using the SW map. As expected, the first order correction 
vanishes and the second order correction is written in covariant form.


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Institute of Physics Belgrade
Pregrevica 118, 11080 Belgrade, Serbia
http://www.ipb.ac.rs/