New Covariant Gauges in String Field Theory
Masako Asano, Mitsuhiro Kato
TL;DR
This paper introduces a new family of covariant gauge fixing conditions in bosonic string field theory, unifying and extending previous gauges, and simplifies the action in the Landau gauge.
Contribution
It proposes a single-parameter family of covariant gauges in string field theory, generalizing existing gauges and simplifying the action in the Landau gauge.
Findings
Unified covariant gauge fixing conditions including Landau and Feynman gauges.
Simplified action in the Landau gauge with reduced derivatives and quadratic terms.
Potential for easier calculations in string field theory.
Abstract
A single-parameter family of covariant gauge fixing conditions in bosonic string field theory is proposed. It is a natural string field counterpart of the covariant gauge in the conventional gauge theory, which includes the Landau gauge as well as the Feynman (Siegel) gauge as special cases. The action in the Landau gauge is largely simplified in such a way that numerous component fields have no derivatives in their kinetic terms and appear in at most quadratic in the vertex.
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