Lower dimensional branes in boundary conformal field theory

Akira Ishida, Yoonbai Kim, Chanju Kim, O. Kab Kwon

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


In the presence of constant background electromagnetic fields, we discuss three types of exactly marginal boundary tachyon operators for static kinks in boundary conformal field theory. Functional forms of three operators are hyperbolic sine, hyperbolic cosine, and exponential types, and they describe codimension-one solitons when the transverse electric field has overcritical value. The energy-momentum tensor and the source for antisymmetric tensor field are computed in the path integral approach for the exponential-type tachyon vertex operator.

Original languageEnglish
Pages (from-to)S36-S40
JournalJournal of the Korean Physical Society
Issue numberSUPPL. 1
StatePublished - May 2007


  • Boundary conformal field theory
  • Tachyon. Kink
  • Unstable D-brane


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