Numerical Solutions of Open String Field Theory in Marginally Deformed Backgrounds

Understand

We investigate numerical solutions of bosonic open string field theory in some marginally deformed backgrounds, which are obtained by expanding the action around an identity-based marginal solution with one parameter.

• We construct numerical solutions in the Siegel gauge and the Landau gauge corresponding to the tachyon vacuum.
• Their vacuum energy approximately cancels the D-brane tension for larger intervals of the parameter with increasing truncation level.
• The result is consistent with the previous expectation that the identity-based marginal solution has vanishing energy regardless of the values of the parameter.