Journal of High Energy Physics

, 2011:107

Relevant deformations in open string field theory: a simple solution for lumps


DOI: 10.1007/JHEP11(2011)107

Cite this article as:
Bonora, L., Maccaferri, C. & Tolla, D.D. J. High Energ. Phys. (2011) 2011: 107. doi:10.1007/JHEP11(2011)107


We propose a remarkably simple solution of cubic open string field theory which describes inhomogeneous tachyon condensation. The solution is in one-to-one correspondence with the IR fixed point of the RG-flow generated in the two-dimensional worldsheet theory by integrating a relevant operator with mild enough OPE on the boundary. It is shown how the closed string overlap correctly captures the shift in the closed string one point function between the UV and the IR limits of the flow. Examples of lumps in non-compact and compact transverse directions are given.


Tachyon CondensationString Field Theory

Copyright information

© SISSA, Trieste, Italy 2011

Authors and Affiliations

  1. 1.International School for Advanced Studies (SISSA)TriesteItaly
  2. 2.INFN — Sezione di TriesteTriesteItaly
  3. 3.International Solvay Institutes and Physique Théorique et MathématiqueUniversité Libre de BruxellesBruxellesBelgium
  4. 4.Department of Physics and University CollegeSungkyunkwan UniversitySuwonSouth Korea