Some exact results on tachyon condensation in string field theory

David Kutasov, Marcos Mariño, Gregory Moore

Research output: Contribution to journalArticlepeer-review

263 Scopus citations


The study of open string tachyon condensation in string field theory can be drastically simplified by making an appropriate choice of coordinates on the space of string fields. We show that a very natural coordinate system is suggested by the connection between the worldsheet renormalization group and spacetime physics. In this system only one field, the tachyon, condenses while all other fields have vanishing expectation values. These coordinates are also well-suited to the study of D-branes as solitons. We use them to show that the tension of the D25-brane is cancelled by tachyon condensation and compute exactly the profiles and tensions of lower dimensional D-branes.

Original languageEnglish (US)
Pages (from-to)11-23
Number of pages13
JournalJournal of High Energy Physics
Issue number10 PART B
StatePublished - 2000

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


  • Bosonic Strings
  • D-branes

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