BPS D-branes from an unstable D-brane

Chanju Kim, Yoonbai Kim, Hwang Hyun Kwon, O. Kab Kwon, Chong Oh Lee

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


We search for exact tachyon kink solutions of DBI type effective action describing an unstable D-brane with worldvolume gauge field turned in both the flat and a curved background. There are various kinds of solutions in the presence of electromagnetic fields in the flat space, such as periodic arrays, topological tachyon kinks, half kinks, and bounces. We identify a BPS object, D(p-1)F1 bound state, which describes a thick brane with string flux density. The curved background of interest is the ten-dimensional lift of the Salam-Sezgin vacuum and, in the asymptotic limit, it approaches R1,4 × T2 × S3. The solutions in the curved background are identified as composites of lower-dimensional D-branes and fundamental strings, and, in the BPS limit, they become a D4D2F1 composite wrapped on R1,2 × T2 where T2 is inside S3.

Original languageEnglish
Title of host publicationPARTICLES, STRINGS, AND COSMOLOGY
Subtitle of host publication11th International Symposium on Particles, Strings, and Cosmology, PASCOS 2005
Number of pages4
StatePublished - 2 Dec 2005
Event11th International Symposium on Particles, Strings and Cosmology, PASCOS 2005 - Gyeongju, Korea, Republic of
Duration: 30 May 20054 Jun 2005

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference11th International Symposium on Particles, Strings and Cosmology, PASCOS 2005
Country/TerritoryKorea, Republic of


  • Kink
  • Tachyon condensation
  • Unstable D-brane


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