Non-Perturbative Tachyon Potential from the Wilsonian Renormalization Group

Abstract

The derivative expansion of the Wilsonian renormalization group generates additional terms in the effective beta-functions not present in the perturbative approach. Applied to the nonlinear sigma model, to lowest order the vanishing of the beta-function for the tachyon field generates an equation analogous to that found in open string field theory. Although the nonlinear term depends on the cut-off function, this arbitrariness can be removed by a rescaling of the tachyon field.

arXiv comment6 pages, further references added

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Cited by in corpus (2)

• A novel non-perturbative approach to String Cosmology
• An Alternative to Exact Renormalization and Cosmological Solutions in String Theory