String cosmology and inflation
Following a suggestion by Gasperini and Veneziano that string cosmology can be reconciled with inflation and, hence, with the standard big bang, we display an analytical solution which possesses four interesting properties: (1) it is nonsingular; (2) it distinguishes the dynamics of the external sca...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
15 February 1995
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| In: |
Physical review. D, Particles, fields, gravitation, and cosmology
Year: 1995, Jahrgang: 51, Heft: 4, Pages: 1607-1616 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.51.1607 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.51.1607 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.51.1607 
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| Verfasserangaben: | Carlo Angelantonj, Luca Amendola, Marco Litterio, and Franco Occhionero |
MARC
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| 520 | |a Following a suggestion by Gasperini and Veneziano that string cosmology can be reconciled with inflation and, hence, with the standard big bang, we display an analytical solution which possesses four interesting properties: (1) it is nonsingular; (2) it distinguishes the dynamics of the external scale factor a(t) from that of the internal one b(t); (3) it exhibits a nonmonotonic behavior of a(t); and (4) it stabilizes both Newton’s constant and b(t) (the latter to a finite, nonvanishing value). The interest of the nonmonotonic evolution of a(t) consists in the fact that it contains three phases of accelerated expansion, contraction, and expansion before the final decelerated expansion which eventually becomes the standard big bang. The total number of e-folds of the three accelerated eras can be calculated and tuned to fit the requests of observational astronomy. | ||
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