From defects to boundaries

Z. Bajnok, A. George

Research output: Article

34 Citations (Scopus)


In this paper we describe how relativistic field theories containing defects are equivalent to a class of boundary field theories. As a consequence previously derived results for boundaries can be directly applied to defects, these results include reduction formulas, the Coleman-Thun mechanism and Cutcosky rules. For integrable theories the defect crossing unitarity equation can be derived and defect operator found. For a generic purely transmitting impurity we use the boundary bootstrap method to obtain solutions of the defect Yang-Baxter equation. The groundstate energy on the strip with defects is also calculated.

Original languageEnglish
Pages (from-to)1063-1077
Number of pages15
JournalInternational Journal of Modern Physics A
Issue number5
Publication statusPublished - febr. 20 2006


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Astronomy and Astrophysics

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