Level truncation analysis of exact solutions in open string field theory

TL;DR

This paper analyzes the vacuum energy density of Schnabl's solution in open string field theory using level truncation, confirming expected results and discussing the role of the phantom term in reproducing the correct vacuum energy.

Contribution

It provides a detailed level truncation analysis of Schnabl's solution, highlighting the importance of the phantom term in accurately reproducing vacuum energy.

Findings

Level truncation yields vacuum energy consistent with theoretical expectations.

The phantom term plays a crucial role in obtaining the correct vacuum energy.

Results support the validity of the level truncation approach in open string field theory.

Abstract

We evaluate vacuum energy density of Schnabl's solution using the level truncation calculation and the total action including interaction terms. The level truncated solution provides vacuum energy density expected both for tachyon vacuum and trivial pure gauge. We discuss the role of the phantom term to reproduce correct vacuum energy.