Test of Siegel Gauge for the Lump Solution

TL;DR

This paper evaluates the validity of the Siegel gauge condition for the lump solution in cubic open bosonic string field theory by analyzing the equations of motion outside the gauge at a specific approximation level.

Contribution

It provides a quantitative test of the Siegel gauge's validity for the lump solution by examining the equations of motion beyond the gauge condition.

Findings

Equations of motion outside the gauge cancel within about 20%.

Level (3,6) approximation used for analysis.

Supports the validity of the Siegel gauge in this context.

Abstract

We test the validity of the Siegel gauge condition for the lump solution of cubic open bosonic string field theory by checking the equations of motion of the string field components outside the Siegel gauge. At level (3,6) approximation, the linear and quadratic terms of the equations of motion of these fields are found to cancel within about 20%.