Abstract
We consider the CFT of a free boson compactified on a circle, such that the compactification radius R is an irrational multiple of R self dual . Apart from the standard Dirichlet and Neumann boundary states, Friedan suggested [D. Friedan, The space of conformal boundary conditions for the c=1 Gaussian model, unpublished note, 1999] that an additional 1-parameter family of boundary states exists. These states break U(1) symmetry of the theory, but still preserve conformal invariance. In this paper we give an explicit construction of these states, show that they are uniquely determined by the Cardy–Lewellen sewing constraints, and we study the spectrum in the ‘open string channel’, which is given here by a continous integral with a nonnegative measure on the space of conformal weights.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
