Wednesday, December 19, 2012

1212.4238 (Rabin Banerjee et al.)

Trivial symmetries in a 3D topological torsion model of gravity    [PDF]

Rabin Banerjee, Debraj Roy
We study the gauge symmetries in a Mielke-Baekler type model of gravity in 2+1 dimensions. The model is built in a Poincare gauge theory framework where localisation of Poincare symmetries lead to gravity. However, explicit construction of gauge symmetries in the model through a Hamiltonian procedure yields an apparently different set of symmetries, as has been noted by various authors. Here, we show that the two sets of symmetries are actually equivalent in a canonical sense, their difference being just a set of trivial symmetries.
View original: http://arxiv.org/abs/1212.4238

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