Citation:Kostelecký, V. A., & Potting, R. (2001). Analytical construction of a nonperturbative vacuum for the open bosonic string. Physical Review D - Particles, Fields, Gravitation and Cosmology, 63(4), 460071-4600714. http://dx.doi.org/10.1103/PhysRevD.63.046007
Using analytical methods, a nonperturbative vacuum is constructed recursively in the field theory for the open bosonic string. Evidence suggests it corresponds to the Lorentz-invariant end point of tachyon condensation on a D25-brane. The corresponding string field is a twisted squeezed state.