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Analytic solution for tachyon condensation in Berkovits` open superstring field theory

This paper provides an exact analytic solution for the tachyon vacuum on a non-BPS D-brane in open superstring field theory. This gave the first rigorous proof of Sen's conjectures in superstring theory, provided intriguing hints into the topological origin of D-brane charge, and established that nonperturbative solutions could be constructed in superstring field theory.

T. Erler, JHEP 1311 (2013) 007.