Relevant Deformations in Open String Field Theory: a Simple Solution for Lumps
arXiv:1009.4158 · doi:10.1007/JHEP11(2011)107
Abstract
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 world-sheet 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.
45 pages. v2: typos and minor improvements. v3: submitted to jhep
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