Fitxers

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2000

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/12343

Open inflation and the singulary boundary

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Recurs relacionat

http://dx.doi.org/10.1103/PhysRevD.61.047301

Resum

The singularity in the Hawking-Turok model of open inflation has some appealing properties, such as the fact that its action is integrable. Also, if one thinks of the singularity as the boundary of spacetime, then the Gibbons-Hawking term is nonvanishing and finite. Here, we consider a model where the gravitational and scalar fields are coupled to a dynamical membrane. The singular instanton can then be obtained as the limit of a family of no-boundary solutions where both the geometry and the scalar field are regular. Using this procedure, the contribution of the singularity to the Euclidean action is just 1/3 of the Gibbons-Hawking term. Unrelated to this issue, we also point out that the singularity acts as a reflecting boundary for scalar perturbations and gravity waves. Therefore, the quantization of cosmological perturbations seems to be well posed in this background.

Matèries

Teoria de camps (Física), Cosmogonia

Matèries (anglès)

Field theory (Physics), Cosmogony

Citació

Col·leccions

Articles publicats en revistes (Física de la Matèria Condensada)

Citació

GARRIGA TORRES, Jaume. Open inflation and the singulary boundary. Physical Review D. 2000. Vol. 61, num. 4, pags. 047301-1-047301-3. ISSN 0556-2821. [consulted: 25 of May of 2026]. Available at: https://hdl.handle.net/2445/12343

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