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- W2029682769 abstract "We set up a canonical Hamiltonian formulation for a theory of gravity based on a Lagrangian density made up of the Hilbert-Palatini term and, instead of the Holst term, the Nieh-Yan topological density. The resulting set of constraints in the time gauge are shown to lead to a theory in terms of a real $SU(2)$ connection which is exactly the same as that of Barbero and Immirzi with the coefficient of the Nieh-Yan term identified as the inverse of the Barbero-Immirzi parameter. This provides a topological interpretation for this parameter. Matter coupling can then be introduced in the usual manner, without changing the universal topological Nieh-Yan term." @default.
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- W2029682769 date "2009-02-06" @default.
- W2029682769 modified "2023-09-27" @default.
- W2029682769 title "Topological interpretation of Barbero-Immirzi parameter" @default.
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- W2029682769 doi "https://doi.org/10.1103/physrevd.79.044008" @default.
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