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On the Tolman-Hawking wormhole

AuthorsGonzález-Díaz, Pedro F.
Issue Date1989
PublisherAmerican Physical Society
CitationPhysical Review D - Particles, Fields, Gravitation and Cosmology 40: 4184- 4185 (1989)
AbstractThe Tolman-Hawking wormhole a=(R2+2)12 can be obtained as a solution of the Einstein equations with a conformally coupled scalar field. However, this procedure gives rise to negative values of the effective gravitational constant. Working in a pure-gravity minisuperspace isotropic model, I propose a much simpler method to obtain this instanton based on the introduction of a cutoff in the scale factor which is equivalent to introducing a three-sphere with minimum constant radius in the Euclidean metric. The resulting wormhole model no longer has any negative effective gravitational constant. © 1989 The American Physical Society.
Identifiersdoi: 10.1103/PhysRevD.40.4184
issn: 0556-2821
Appears in Collections:(CFMAC-IO) Artículos
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