Inducing Barbero-Immirzi Connections along SU(2)-reductions of Bundles on Spacetime

Details Inducing Barbero-Immirzi Connections along SU(2)-reductions of Bundles on Spacetime Inducing Barbero-Immirzi Connections along SU(2)-reductions of Bundles on Spacetime

2010-11-09

arxiv.org/abs/1011.2041v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, some comments added

Scientific paper

We shall present here a general apt technique to induce connections along bundle reductions which is different from the standard restriction. This clarifies and generalizes the standard procedure to define Barbero-Immirzi (BI) connection, though on spacetime. The standard spacial BI connection used in LQG is then obtained by its spacetime version by standard restriction. The general prescription to define such a reduced connection is interesting from a mathematical viewpoint and it allows a general and direct control on transformation laws of the induced object. Moreover, unlike what happens by using standard restriction, we shall show that once a bundle reduction is given, then any connection induces a reduced connection with no constraint on the original holonomy as it happens when connections are simply restricted.

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