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Real Tachyon Vacuum Solution without Square Roots
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In this note we present a real tachyon vacuum solution for open bosonic string field theory which does not require computing square roots of states in the wedge algebra. We study its algebraic structure, prove the equation of motion and show that the solution supports no cohomology. Finally we show that its energy is in agreement with the value predicted by Sen's conjecture.
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Numerical solution for tachyon vacuum in the Schnabl gauge
A new level-truncation method reaches level 24 in the Schnabl gauge and shows the tachyon vacuum energy has a local minimum at level 12 before extrapolating toward the analytic value -1.
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