Fermion Representation Of The Rolling Tachyon Boundary Conformal Field Theory

TL;DR

This paper develops a free fermion representation of the rolling tachyon boundary conformal field theory, enabling explicit calculations of boundary states and amplitudes relevant to string theory.

Contribution

It introduces a novel free fermion representation for the rolling tachyon boundary conformal field theory, facilitating exact boundary state expressions.

Findings

Explicit boundary state expression derived

Disc and cylinder amplitudes computed for the half-S-brane

Enhanced understanding of tachyon dynamics in string theory

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.