Symplectic structure in open string field theory III: Electric field

Abstract

We use a new formula for the symplectic structure on the phase space of open string field theory to evaluate the energy of a D-brane carrying a constant electric flux. This is shown to be consistent with the energy computed using the Dirac-Born-Infeld action through a generalization of the Ellwood invariant to nonpolynomial open string field theories.

35+18 pages, 12 figures, 1 .nb file; v2: minor corrections

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