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gr-qc2010★ 14 cited
A Unified Theory of Non-Linear Electrodynamics and Gravity
Alexander Torres-Gomez, Kirill Krasnov, Carlos Scarinci
We describe a class of unified theories of electromagnetism and gravity. The Lagrangian is of the BF type, with a potential for the B-field, the gauge group is U(2) (complexified).…
gr-qc2008★ 32 cited
Remarks on Barbero-Immirzi parameter as a field
Alexander Torres-Gomez, Kirill Krasnov
We revisit a propagating torsion gravity theory obtained by introducing a field coupled to the Holst term in the first-order Einstein-Cartan action. The resulting theory has second…