Codimension two lump solutions in string field theory and tachyonic theories

TL;DR

This paper explores lump solutions in two-dimensional string field theory and tachyonic models, comparing their properties and discussing convergence, to better understand solitonic features in string theories.

Contribution

It introduces lump solutions in simplified tachyonic models and compares them with string field theory solutions, aiding the understanding of solitons in string theory.

Findings

Lump solutions are constructed in simplified models.

Comparison reveals similarities and differences between theories.

Discussion on convergence issues in solutions.

Abstract

We present some solutions for lumps in two dimensions in level-expanded string field theory, as well as in two tachyonic theories: pure tachyonic string field theory and pure $\phi^3$ theory. Much easier to handle, these theories might be used to help understanding solitonic features of string field theory. We compare lump solutions between these theories and we discuss some convergence issues.