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Real and complex connections for canonical gravity

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arxiv gr-qc/9612030 v1 pith:ZNIMYKFS submitted 1996-12-12 gr-qc

Giorgio Immirzi This is my paper
classification gr-qc
keywords complexconnectionrealbetacanonicalconnectionsgaugegravity
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Both real and complex connections have been used for canonical gravity: the complex connection has SL(2,C) as gauge group, while the real connection has SU(2) as gauge group. We show that there is an arbitrary parameter $\beta$ which enters in the definition of the real connection, in the Poisson brackets, and therefore in the scale of the discrete spectra one finds for areas and volumes in the corresponding quantum theory. A value for $\beta$ could be could be singled out in the quantum theory by the Hamiltonian constraint, or by the rotation to the complex Ashtekar connection.

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Cited by 4 Pith papers

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