Tachyon condensation in unstable type I D-brane systems

Abstract

Type I string theory provides eight classes of unstable D-brane systems. We determine the gauge group and tachyon spectrum for each one, and thereby describe the gauge symmetry breaking pattern in the low-energy world-volume field theory. The topologies of the resulting coset vacuum manifolds are related to the real K-theory groups KO^{-n}, extending the known relations between the Type II classifying spaces BU and U and the complex K-theory groups K^0 and K^{-1}. We also comment on the role of the background D9-branes.

14 pages, LaTex; footnote regarding bosonic D-branes has been corrected, references added

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Cited by in corpus (17)

• Tachyon Dynamics in Open String Theory
• Exact Description of D-branes via Tachyon Condensation
• D-brane, fluxes and chirality
• Topological Superconductors on Superstring Worldsheets
• Topological Insulators and Superconductors from String Theory
• New Supersymmetric String Theories from Discrete Theta Angles
• The fate of the type I non-BPS D7-brane
• Dirichlet Branes on Orientifolds
• Hierarchies of RG flows in 6d $(1,0)$ massive E-strings
• On The Structure Of The Chan-Paton Factors For D-Branes In Type II Orientifolds
• O(N) and USp(N) QCD from String Theory
• Branes and Fluxes in Orientifolds and K-theory
• D-branes and KK-theory in Type I String Theory
• D-Branes in Orientifolds and Orbifolds and Kasparov KK-Theory
• K-theoretic matching of brane charges in S- and U-duality
• When D-branes Break
• Exact description of D-branes in K-matrix theory