Phys. Rev. D 57, 6104–6112 (1998)Husain-Kuchař model: Time variables and nondegenerate metricsReceived 26 November 1997; published in the issue dated 15 May 1998 We study the Husain-Kuchař model by introducing a new action principle similar to the self-dual action used in the Ashtekar variables approach to quantum gravity. This new action has several interesting features, among them the presence of a scalar time variable that allows the definition of geometric observables without adding new degrees of freedom, the appearance of a natural nondegenerate four-metric, and the possibility of coupling ordinary matter. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.57.6104
DOI:
10.1103/PhysRevD.57.6104
PACS:
04.20.Cv, 04.20.Fy
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