Does the tachyon matter?
We study time-dependent solutions of Einstein-Maxwell gravity in four dimensions coupled to tachyon matter--the Dirac-Born-Infeld Lagrangian that provides an effective description of a decaying tachyon on an unstable D-brane in string theory. Asymptotically, the solutions are similar to the recently...
Enregistré dans:
| Auteurs principaux: | , , |
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| Format: | Article (Journal) Chapter/Article |
| Langue: | anglais |
| Publié: |
2002
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| In: |
Arxiv
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| Accès en ligne: | Verlag, kostenfrei, Volltext: http://arxiv.org/abs/hep-th/0207235
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| Notes sur l'auteur: | Alex Buchel, Peter Langfelder, and Johannes Walcher |
| Résumé: | We study time-dependent solutions of Einstein-Maxwell gravity in four dimensions coupled to tachyon matter--the Dirac-Born-Infeld Lagrangian that provides an effective description of a decaying tachyon on an unstable D-brane in string theory. Asymptotically, the solutions are similar to the recently studied space-like brane solutions and carry S-brane charge. They do not break the Lorentzian R-symmetry. We study the tachyon matter as a probe in such a background and analyze its backreaction. For early/late times, the tachyon field has a constant energy density and vanishing pressure as in flat space. On the other hand, at intermediate times, the energy density of the tachyon diverges and produces a space-like curvature singularity. |
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| Description: | Gesehen am 15.02.2018 |
| Description matérielle: | Online Resource |