Toy models for closed string tachyon solitons

  title={Toy models for closed string tachyon solitons},
  author={Oren Bergman and Shlomo S. Razamat},
We present qualitative evidence that closed string tachyon solitons describe backgrounds of lower-dimensional sub-critical string theory. We show that a co-dimension one soliton in the low energy effective gravity-dilaton-tachyon theory in general has a flat string-frame metric, and a dilaton that grows in both directions away from the core, and is linear in the soliton worldvolume coordinates. Spacetime, as seen in the Einstein frame, is therefore effectively localized in (D − 1)-dimensions… CONTINUE READING

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