Boundary states in coset conformal field theories

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23 Citations (Scopus)


We construct various boundary states in the coset conformal field theory G / H. The G / H theory admits the twisted boundary condition if the G theory has an outer automorphism of the horizontal subalgebra that induces an automorphism of the H theory. By introducing the notion of the brane identification and the brane selection rule, we show that the twisted boundary states of the G / H theory can be constructed from those of the G and the H theories. We apply our construction to the su(n) diagonal cosets and the su(2)/u(1) parafermion theory to obtain the twisted boundary states of these theories.

Original languageEnglish
Pages (from-to)209-232
Number of pages24
JournalNuclear Physics B
Issue number1-3
Publication statusPublished - 2002 May 13


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