A closed, expanding universe in string theory

Chiara R. Nappi; Edward Witten

doi:10.1016/0370-2693(92)90888-B

A closed, expanding universe in string theory

Chiara R. Nappi, Edward Witten

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

118 Scopus citations

Abstract

We present a conformal field theory - obtained from a gauged WZW model - that describes a closed, inhomogeneous expanding and recollapsing universe in 3 + 1 dimensions. A possible violation of cosmic censorship is avoided because the universe recollapses just when a naked singularity was about to form. The model has been chosen to have c = 4 (or c ̂ = 4 in the supersymmetric case), just like four dimensional Minkowski space.

Original language	English (US)
Pages (from-to)	309-314
Number of pages	6
Journal	Physics Letters B
Volume	293
Issue number	3-4
DOIs	https://doi.org/10.1016/0370-2693(92)90888-B
State	Published - Oct 29 1992
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/0370-2693(92)90888-B

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title = "A closed, expanding universe in string theory",

abstract = "We present a conformal field theory - obtained from a gauged WZW model - that describes a closed, inhomogeneous expanding and recollapsing universe in 3 + 1 dimensions. A possible violation of cosmic censorship is avoided because the universe recollapses just when a naked singularity was about to form. The model has been chosen to have c = 4 (or c{\^ } = 4 in the supersymmetric case), just like four dimensional Minkowski space.",

author = "Nappi, {Chiara R.} and Edward Witten",

note = "Funding Information: Research supported in part by the Ambrose Monell Foundation. Research supported in part by NSF Grant PHY91-06210. In particular, refs. \[1 1,12 \] discuss different real forms of the coset we will analyze, not directly leading to the cosmological solution. This coset has also been mentioned by several other authors without analyzing its content.",

year = "1992",

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doi = "10.1016/0370-2693(92)90888-B",

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pages = "309--314",

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T1 - A closed, expanding universe in string theory

AU - Nappi, Chiara R.

AU - Witten, Edward

N1 - Funding Information: Research supported in part by the Ambrose Monell Foundation. Research supported in part by NSF Grant PHY91-06210. In particular, refs. \[1 1,12 \] discuss different real forms of the coset we will analyze, not directly leading to the cosmological solution. This coset has also been mentioned by several other authors without analyzing its content.

PY - 1992/10/29

Y1 - 1992/10/29

N2 - We present a conformal field theory - obtained from a gauged WZW model - that describes a closed, inhomogeneous expanding and recollapsing universe in 3 + 1 dimensions. A possible violation of cosmic censorship is avoided because the universe recollapses just when a naked singularity was about to form. The model has been chosen to have c = 4 (or c ̂ = 4 in the supersymmetric case), just like four dimensional Minkowski space.

AB - We present a conformal field theory - obtained from a gauged WZW model - that describes a closed, inhomogeneous expanding and recollapsing universe in 3 + 1 dimensions. A possible violation of cosmic censorship is avoided because the universe recollapses just when a naked singularity was about to form. The model has been chosen to have c = 4 (or c ̂ = 4 in the supersymmetric case), just like four dimensional Minkowski space.

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DO - 10.1016/0370-2693(92)90888-B

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VL - 293

SP - 309

EP - 314

JO - Physics Letters B

JF - Physics Letters B

IS - 3-4

ER -

A closed, expanding universe in string theory

Abstract

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