Abstract:
These notes are an expanded version of a review lecture on closed string tachyon condensation at the RTN workshop in Copenhagen in September 2003. We begin with a lightning review of open string tachyon condensation, and then proceed to review recent results on localized closed string tachyon condensation, focusing on two simple systems, C/Z_n orbifolds and twisted circle compactifications.
  • lectures: Copenhagen 2003/09/15
  • string model
  • string: closed
  • string: open
  • tachyon: condensation
  • field theory: string
  • boundary condition
  • renormalization group: transformation
  • entropy
  • supersymmetry: symmetry breaking