86 citations · 190 across the 3 of their papers we have counts for
3 papers
gr-qc2009★ 19 cited
A possible topological interpretation of the Barbero-Immirzi parameter
Simone Mercuri
A possible topological interpretation of the Barbero-Immirzi parameter is proposed. Classically, by generalizing the Holst action to torsional spacetimes, we construct a precise an…
gr-qc2009★ 86 cited
Barbero-Immirzi field in canonical formalism of pure gravity
Gianluca Calcagni, Simone Mercuri
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 e…
gr-qc2009★ 85 cited
Peccei--Quinn mechanism in gravity and the nature of the Barbero--Immirzi parameter
Simone Mercuri
A general argument provides the motivation to consider the Barbero--Immirzi parameter as a field. The specific form of the geometrical effective action allows to relate the value o…