Towards a Stringy Resolution of the Cosmological Singularity

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dc.creatorEasson, Damien A.
dc.date2003-04-19
dc.date2003-07-06
dc.date.accessioned2026-07-07T04:15:10Z
dc.date.available2026-07-07T04:15:10Z
dc.descriptionWe study cosmological solutions to the low-energy effective action of heterotic string theory including possible leading order $α'$ corrections and a potential for the dilaton. We consider the possibility that including such stringy corrections can resolve the initial cosmological singularity. Since the exact form of these corrections is not known the higher-derivative terms are constructed so that they vanish when the metric is de Sitter spacetime. The constructed terms are compatible with known restrictions from scattering amplitude and string worldsheet beta-function calculations. Analytic and numerical techniques are used to construct a singularity-free cosmological solution. At late times and low-curvatures the metric is asymptotically Minkowski and the dilaton is frozen. In the high-curvature regime the universe enters a de Sitter phase.
dc.description6 pages, 2 Figures; minor revisions; references added; REVTeX 4; version to appear in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-th/0304168
dc.identifierhttp://arxiv.org/abs/hep-th/0304168
dc.identifierPhys.Rev. D68 (2003) 043514
dc.identifierdoi:10.1103/PhysRevD.68.043514
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/51901
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleTowards a Stringy Resolution of the Cosmological Singularity
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