2000 character limit reached
Barbero-Immirzi field in canonical formalism of pure gravity (0902.0957v2)
Published 5 Feb 2009 in gr-qc and hep-th
Abstract: The Barbero-Immirzi (BI) parameter is promoted to a field and a canonical analysis is performed when it is coupled with a Nieh-Yan topological invariant. It is shown that, in the effective theory, the BI field is a canonical pseudoscalar minimally coupled with gravity. This framework is argued to be more natural than the one of the usual Holst action. Potential consequences in relation with inflation and the quantum theory are briefly discussed.
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