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Fermion Representation Of The Rolling Tachyon Boundary Conformal Field Theory

Taejin Lee, Gordon W. Semenoff

hep-tharXiv:hep-th/0502236

Abstract

A free fermion representation of the rolling tachyon boundary conformal field theory is constructed. The representation is used to obtain an explicit, compact, exact expression for the boundary state. We use the boundary state to compute the disc and cylinder amplitudes for the half-S-brane.

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