Gravitational kinks in two spacetime dimensions

Details Gravitational kinks in two spacetime dimensions Gravitational kinks in two spacetime dimensions

1996-01-11

arxiv.org/abs/gr-qc/9601018v1

Class.Quant.Grav. 13 (1996) 1995-2006

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, Plain Tex, 4 figures (available from the authors)

Scientific paper

10.1088/0264-9381/13/7/024

The properties of gravitational kinks are studied within some simple models of two dimensional gravity. In spacetimes of cylindrical topology we prove the existence of kinks of constant curvature with arbitrary kink numbers. In $R^1\times R^1$ spacetimes $m=1$ kink solutions of the equation $R=0$ are found, whereas $|m|>1$ flat kinks are proved not to exist. We give a detailed analysis of the behaviour of gravitational kinks under coordinate transformations. Viewed as nonsingular black holes $|m|>1$ kink solutions are found within a simple dilaton gravity theory. The general form of the potential function is determined from the demand that the theory possesses an arbitrary number of inequivalent kink configurations.

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