Closed-string tachyon condensation and loop corrected on-shell effective action of open-string tachyons
Shin Nakamura · AIP conference proceedings · 2002
We propose a basic strategy to obtain a consistent on-shell effective action of open-string tachyons, on the background where closed-string tachyons are already condensed. We use sigma-model approach, basically. We regard D-instanton-like objects with appropriate weight as closed-string tachyon tadpoles, and we insert them into worldsheets to analyze the effect of closed-string tachyons.