Evidence for heterotic - Type I string duality

Joseph Polchinski, Edward Witten

Research output: Contribution to journalArticlepeer-review

509 Scopus citations


A study is made of the implications of heterotic string T-duality and extended gauge symmetry for the conjectured equivalence of heterotic and Type I superstrings. While at first sight heterotic string world-sheet dynamics appears to conflict with Type I perturbation theory, a closer look shows that Type I perturbation theory "miraculously" breaks down, in some cases via novel mechanisms, whenever the heterotic string has massless particles not present in Type I perturbation theory. This strongly suggests that the two theories actually are equivalent. As further evidence in the same direction, we show that the Dirichlet one-brane of Type I string theory has the same world-sheet structure as the heterotic string.

Original languageEnglish (US)
Pages (from-to)525-540
Number of pages16
JournalNuclear Physics B
Issue number3
StatePublished - Feb 12 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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