Closed string tachyons and their implications for non-supersymmetric strings

Michael Dine, Elie Gorbatov, Igor R. Klebanov, Michael Krasnitz

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Closed string tachyons have long been somewhat mysterious. We note that there is often a regime in the classical moduli space in which one can systematically compute the effective action for such fields. In this regime, the tachyon is light, and cannot be integrated out. Instead, one must consider the combined dynamics of gravitons, moduli, tachyons and other light fields. We compute the action and find that the quartic term for the tachyon is positive in the field definition where the tachyon has no derivative coupling to the radion. We study the evolution of isotropic, homogeneous configurations and find that typically the system is driven to regions where the calculation is no longer under control.

Original languageEnglish (US)
Pages (from-to)829-838
Number of pages10
JournalJournal of High Energy Physics
Issue number7
StatePublished - Jul 1 2004

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


  • Superstring Vacua
  • Superstrings and Heterotic Strings
  • Tachyon Condensation


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