Closed string field theory with dynamical D-brane

Tsuguhiko Asakawa, Shinpei Kobayashi, So Matsuura

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We consider a closed string field theory with an arbitrary matter current as a source of the closed string field. We find that the source must satisfy a constraint equation as a consequence of the BRST invariance of the theory. We see that it corresponds to the covariant conservation law for the matter current, and the equation of motion together with this constraint equation determines the classical behavior of both the closed string field and the matter. We then consider the boundary state (D-brane) as an example of a source. We see that the ordinary boundary state cannot be a source of the closed string field when the string coupling g turns on. By perturbative expansion, we derive a recursion relation which represents the bulk backreaction and the D-brane recoil. We also make a comment on the rolling tachyon boundary state.

Original languageEnglish
Pages (from-to)513-535
Number of pages23
JournalJournal of High Energy Physics
Issue number10
Publication statusPublished - 2003 Oct 1
Externally publishedYes


  • Bosonic Strings
  • Classical Theories of Gravity
  • D-branes
  • String Field Theory

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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