Light-like tachyon condensation in Open String Field Theory

Details Light-like tachyon condensation in Open String Field Theory Light-like tachyon condensation in Open String Field Theory

2008-03-10

arxiv.org/abs/0803.1184v1

Physics

High Energy Physics

High Energy Physics - Theory

40 pages

Scientific paper

We use open string field theory to study the dynamics of unstable branes in the bosonic string theory, in the background of a generic linear dilaton. We find a simple exact solution describing a dynamical interpolation between the perturbative vacuum and the recently discovered nonperturbative tachyon vacuum. In our solution, the open string tachyon increases exponentially along a null direction, after which nonlinearities set in and cause the solution to asymptote to a static state. In particular, the wild oscillations of the open string fields which plague the time-like rolling tachyon solution are entirely absent. Our model thus represents the first example proving that the true tachyon vacuum of open string field theory can be realized as the endpoint of a dynamical transition from the perturbative vacuum.

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