Gauge Invariance and Tachyon Condensation in Open String Field Theory

Abstract

The gauge invariance of open string field theory is considered from the point of view of level truncation, and applications to the tachyon condensation problem are discussed. We show that the region of validity of Feynman-Siegel gauge can be accurately determined using the level truncation method. We then show that singularities previously found in the tachyon effective potential are gauge artifacts arising from the boundary of the region of validity of Feynman-Siegel gauge. The problem of finding the stable vacuum and tachyon potential without fixing Feynman-Siegel gauge is addressed.

arXiv comment12 pages, 3 figures, LaTeX; work presented by WT at Strings 2001

References in corpus (8)

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• Komaba Lectures on Noncommutative Solitons and D-Branes
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• Decoupling of Degenerate Positive-norm States in Witten's String Field Theory
• Gauge Invariance and Tachyon Condensation in Cubic Superstring Field Theory
• Level Truncation and Rolling the Tachyon in the Lightcone Basis for Open String Field Theory
• Locality, Causality, and an Initial Value Formulation for Open String Field Theory
• On One-Loop Approximation to Tachyon Potentials
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• Level-Expansion Analysis in NS Superstring Field Theory Revisited
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• Survey of the Tachyonic Lump in Bosonic String Field Theory
• SFT on separated D-branes and D-brane translation
• Ising model conformal boundary conditions from open string field theory
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