Comments on Takahashi-Tanimoto's scalar solution
arXiv:1408.6319 · doi:10.1007/JHEP02(2015)168
Abstract
We study the identity-based solution of Witten's cubic bosonic open string field theory constructed by Takahashi and Tanimoto, which is claimed to describe the tachyon vacuum. We argue that the observables of the solution coincide with those of the tachyon vacuum using the method proposed by Kishimoto and Takahashi. We also discuss how to treat the kinetic term of the string field theory expanded around it.
arXiv comment25 pages, 4 figures, v3: several clarifications added, corrected statements about operator U, v4: comments on operator U_k are added
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