Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-11-02
JHEP 0308 (2003) 048
Physics
High Energy Physics
High Energy Physics - Theory
37 pages, 6 figures
Scientific paper
10.1088/1126-6708/2003/08/048
We develop efficient algorithms for level-truncation computations in open bosonic string field theory. We determine the classical action in the universal subspace to level (18,54) and apply this knowledge to numerical evaluations of the tachyon condensate string field. We obtain two main sets of results. First, we directly compute the solutions up to level L=18 by extremizing the level-truncated action. Second, we obtain predictions for the solutions for L > 18 from an extrapolation to higher levels of the functional form of the tachyon effective action. We find that the energy of the stable vacuum overshoots -1 (in units of the brane tension) at L=14, reaches a minimum E_min = -1.00063 at L ~ 28 and approaches with spectacular accuracy the predicted answer of -1 as L -> infinity. Our data are entirely consistent with the recent perturbative analysis of Taylor and strongly support the idea that level-truncation is a convergent approximation scheme. We also check systematically that our numerical solution, which obeys the Siegel gauge condition, actually satisfies the full gauge-invariant equations of motion. Finally we investigate the presence of analytic patterns in the coefficients of the tachyon string field, which we are able to reliably estimate in the L -> infinity limit.
Gaiotto Davide
Rastelli Leonardo
No associations
LandOfFree
Experimental String Field Theory does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Experimental String Field Theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Experimental String Field Theory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-364753