46 research outputs found
Gauge Invariant Overlaps for Classical Solutions in Open String Field Theory
We calculate gauge invariant observables for Schnabl's solution with analytic
method and with the level truncation approximation. We also compute them for
the numerical solution initially obtained by Sen and Zwiebach in the level
truncation approximation to compare with the one for Schnabl's solution. The
results are consistent with the expectation that they may be gauge equivalent.
We briefly discuss the gauge invariant observables and the action for a
marginal solution with a nonsingular current.Comment: 33 pages, 5 figures, LaTeX; v2:typos corrected, references added; v3:
improved numerical analysis in section
Level truncation analysis of exact solutions in open string field theory
We evaluate vacuum energy density of Schnabl's solution using the level
truncation calculation and the total action including interaction terms. The
level truncated solution provides vacuum energy density expected both for
tachyon vacuum and trivial pure gauge. We discuss the role of the phantom term
to reproduce correct vacuum energy.Comment: 11 pages, 6 figures,v2: 1 figure replace