Title:	SU(2) gauge theory of gravity with topological invariants
Authors:	Sengupta, Sandipan
Issue Date:	May-2011
Publisher:	IOP Publishing Ltd
Citation:	Journal of Physics: Conference Series, 2012, Vol. 360, p012024
Abstract:	The most general gravity Lagrangian in four dimensions contains three topological densities, namely Nieh-Yan, Pontryagin and Euler, in addition to the Hilbert-Palatini term. We set up a Hamiltonian formulation based on this Lagrangian. The resulting canonical theory depends on three parameters which are coefficients of these terms and is shown to admit a real SU(2) gauge theoretic interpretation with a set of seven first-class constraints. Thus, in addition to the Newton's constant, the theory of gravity contains three (topological) coupling constants, which might have non-trivial imports in the quantum theory, e.g. in quantum geometry.
Description:	Open Access
URI:	http://hdl.handle.net/2289/7883
ISSN:	1742-6588 1742-6596 (Online)
Alternative Location:	https://arxiv.org/abs/1110.4185 https://doi.org/10.1088/1742-6596/360/1/012024 https://ui.adsabs.harvard.edu/abs/2012JPhCS.360a2024S/abstract
Copyright:	2012 IOP Publishing Ltd.
Appears in Collections:	Research Papers (TP)

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