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Article overview
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Does the Tachyon Matter? | | Alex Buchel
; Peter Langfelder
; Johannes Walcher
; | | Date: |
26 Jul 2002 | | Journal: | Annals Phys. 302 (2002) 78-87 | | Subject: | hep-th | | Abstract: | 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. | | Source: | arXiv, hep-th/0207235 | | Services: | Forum | Review | PDF | Favorites | |
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