TL;DR
This paper computes the tachyon potential in the sliver frame using off-shell methods, providing evidence that Schnabl's solution is a saddle point and lies at the minimum of the effective potential in open string field theory.
Contribution
It offers the first off-shell computation of the tachyon potential in the sliver frame and clarifies the nature of Schnabl's solution as a saddle point and minimum.
Findings
Schnabl's solution is a saddle point of the full tachyon potential.
Schnabl's solution is located at the minimum of the effective tachyon potential.
The paper provides strong evidence supporting the interpretation of Schnabl's solution in open string field theory.
Abstract
We evaluate the tachyon potential in the Schnabl gauge through off-shell computations in the sliver frame. As an application of the results of our computations, we provide a strong evidence that Schnabl's analytic solution for tachyon condensation in open string field theory represents a saddle point configuration of the full tachyon potential. Additionally we verify that Schnabl's analytic solution lies on the minimum of the effective tachyon potential.
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