Gravitational bags and solitary cosmological evolution

Aharon Davidson; E. I. Guendelman

doi:10.1016/0550-3213(89)90402-1

Gravitational bags and solitary cosmological evolution

Aharon Davidson, E. I. Guendelman

Department of Physics

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

The role played by the sophisticated scalar potential, dictated by spontaneous compactification, is analyzed. A fine-tuning is mandatory for achieving asymptotic flatness. Two main aspects are studied. (i) The three-fold spherically symmetric case exhibits localized four-dimensional objects, to be referred to as "gravitational bags". These are cores of scalar fields confined by means of a cosmic domain wall, whose size only slightly exceeds equal-mass black holes. (ii) The cosmological case introduces a novel scenario of "solitary evolution". Triggered by the collapse of the extra dimensions, the universe undergoes inflationary stage before setting in an oscillating fashion, in its ground state.

Original language	English
Pages (from-to)	693-710
Number of pages	18
Journal	Nuclear Physics B
Volume	313
Issue number	3
DOIs	https://doi.org/10.1016/0550-3213(89)90402-1
State	Published - 13 Feb 1989

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0550-3213(89)90402-1

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title = "Gravitational bags and solitary cosmological evolution",

abstract = "The role played by the sophisticated scalar potential, dictated by spontaneous compactification, is analyzed. A fine-tuning is mandatory for achieving asymptotic flatness. Two main aspects are studied. (i) The three-fold spherically symmetric case exhibits localized four-dimensional objects, to be referred to as {"}gravitational bags{"}. These are cores of scalar fields confined by means of a cosmic domain wall, whose size only slightly exceeds equal-mass black holes. (ii) The cosmological case introduces a novel scenario of {"}solitary evolution{"}. Triggered by the collapse of the extra dimensions, the universe undergoes inflationary stage before setting in an oscillating fashion, in its ground state.",

author = "Aharon Davidson and Guendelman, {E. I.}",

note = "Funding Information: We would like to thank S. Blau and A. Guth for conversations concerning the thin-wall approximation and J. Bekenstein and D. Owen for additional conversations; also we are grateful to E. Harrington for typing this paper. This research has been partially supported by a grant from the Fund for Basic Research administered by the Israel Academy of Sciences and Humanities.",

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Gravitational bags and solitary cosmological evolution

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