A simple analytic solution for Tachyon condensation

Abstract

In this paper we present a new and simple analytic solution for tachyon condensation in open bosonic string field theory. Unlike the 0 gauge solution, which requires a carefully regulated discrete sum of wedge states subtracted against a mysterious ``phantom'' counter term, this new solution involves a continuous integral of wedge states, and no regularization or phantom term is necessary. Moreover, we can evaluate the action and prove Sen's conjecture in a mere few lines of calculation.