Exact c=1 boundary conformal field theories

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43 Scopus citations


We present a solution of the problem of a free massless scalar field on the half line interacting through a sinusoidal potential on the boundary. For a critical value of the period, this system is a conformal field theory with a nontrivial and explicitly calculable S matrix for scattering from the boundary. It describes the critical behavior of a number of condensed matter systems, including dissipative quantum mechanics and of barriers in ''quantum wires.''

Original languageEnglish (US)
Pages (from-to)1968-1971
Number of pages4
JournalPhysical review letters
Issue number13
StatePublished - 1994

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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