On the degenerate phase boundaries

Details On the degenerate phase boundaries On the degenerate phase boundaries

1999-04-26

arxiv.org/abs/gr-qc/9904063v1

Class.Quant.Grav. 16 (1999) 605-610

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, Revtex

Scientific paper

10.1088/0264-9381/16/2/021

The structure of the phase boundary between degenerate and non-degenerate regions in Ashtekar's gravity has been studied by Bengtsson and Jacobson who conjectured that the "phase boundary" should always be null. In this paper, we reformulate the reparametrization procedure in the mapping language and distinguish a phase boundary from its image. It is shown that the image has to be null, while the nullness of the phase boundary requries more suitable criterion.

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