Comments on Solutions for Nonsingular Currents in Open String Field Theories

TL;DR

This paper develops a unified framework for constructing analytic solutions in open string field theories, generalizing known solutions and revealing their origins from simple identity-based states.

Contribution

It introduces a method to generate solutions using a commutative monoid, encompassing wedge states, and connects these to known solutions like the tachyon vacuum.

Findings

Solutions include generalizations of marginal deformations by nonsingular currents

Reproduces Schnabl's tachyon vacuum solution from simple identity-based solutions

Provides insights into gauge transformations and field redefinitions in string field theories

Abstract

We investigate analytic solutions to Witten's bosonic string field theory and Berkovits' WZW-type superstring field theory. We construct solutions with parameters out of simpler ones, using a commutative monoid that includes the family of wedge states. Our solutions are generalizations of solutions for marginal deformations by nonsingular currents, and can also reproduce Schnabl's tachyon vacuum solution in bosonic string field theory. This implies that such known solutions are generated from simple solutions which are based on the identity state. We also discuss gauge transformations and induced field redefinitions for our solutions in both bosonic and super string field theory.