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  A class of non-singular gravi-dilaton backgrounds

Buonanno, A., Gasperini, M., & Ungarelli, C. (1997). A class of non-singular gravi-dilaton backgrounds. Modern Physics Letters A, 25(12): CERN-TH/97-41, pp. 1883-1889. doi:10.1142/S021773239700193X.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-BDEB-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-BDEC-F
Genre: Journal Article

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hep-th_9707053.pdf (Preprint), 106KB
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Buonanno, A.1, 2, 3, Author              
Gasperini, M., Author
Ungarelli, C., Author
Affiliations:
1Theory Division, CERN, escidoc:persistent22              
2Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, escidoc:persistent22              
3Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:1933290              

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Free keywords: High Energy Physics - Theory, hep-th,General Relativity and Quantum Cosmology, gr-qc
 Abstract: We present a class of static, spherically symmetric, non-singular solutions of the tree-level string effective action, truncated to first order in $\alpha'$. In the string frame the solutions approach asymptotically (at $r\to 0$ and $r\to \infty$) two different anti-de Sitter configurations, thus interpolating between two maximally symmetric states of different constant curvature. The radial-dependent dilaton defines a string coupling which is everywhere finite, with a peak value that can be chosen arbitrarily small so as to neglect quantum-loop corrections. This example stresses the possible importance of finite-size $\alpha'$ corrections, typical of string theory, in avoiding space-time singularities.

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 Dates: 1997-07-041997
 Publication Status: Published in print
 Pages: 9 pages, LATEX, four figure included using EPSFIG. Essay written for the 1997 Awards of the Gravity Research Foundation, and selected for "Honorable Mention". To appear in Mod. Phys. Lett. A
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 Identifiers: arXiv: hep-th/9707053
DOI: 10.1142/S021773239700193X
URI: http://arxiv.org/abs/hep-th/9707053
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Title: Modern Physics Letters A
Source Genre: Journal
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Publ. Info: Singapore : World Scientific
Pages: - Volume / Issue: 25 (12) Sequence Number: CERN-TH/97-41 Start / End Page: 1883 - 1889 Identifier: ISSN: 0217-7323
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954925493936