On exact tachyon potential in open string field theory

2000/09/14 by Anton A. Gerasimov, Anton A Gerasimov, Samson L. Shatashvili +1 · 5 citations
Mathematics · Physics and Astronomy · #Algebraic and Geometric Analysis #Black Holes and Theoretical Physics #advanced mathematical theories #hep-th

paper · pdf · doi:10.1088/1126-6708/2000/10/034

published as JHEP 0010 (2000) 034 · 12pages, harvmac b mode, corrected some typos

arxiv created 2000/09/14 · openalex publication_date 2000/10/18 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

In these notes we revisit the tachyon lagrangian in the open string field theory using background independent approach of Witten from 1992. We claim that the tree level lagrangian (up to second order in derivatives and modulo some class of field redefinitions) is given by L = e^-T (∂ T)² + (1+T)e^-T. Upon obvious change of variables this leads to the potential energy -ϕ² log ϕ² \over e with canonical kinetic term. This lagrangian may be also obtained from the effective tachyon lagrangian of the p-adic strings in the limit p→ 1. Applications to the problem of tachyon condensation are discussed.

Cited by

• The boundary state formalism and conformal invariance in off-shell string theory
• Rolling Tachyon
• Tachyon solutions in boundary and open string field theory
• Tachyonic inflation in the braneworld scenario
• Time evolution viaS-branes