Tachyonic Kink and Lump-like Solutions in Superstring Field Theory

TL;DR

This paper constructs and analyzes kink and lump-like solutions in superstring field theory, demonstrating that the tension of the solutions closely matches theoretical expectations and testing the effectiveness of the Berkovits formulation.

Contribution

It introduces explicit kink and lump solutions in superstring field theory using the level truncation scheme, providing evidence for the theory's validity.

Findings

Kink tension reproduces 95% of expected BPS D-brane tension

Lump solutions interpreted as kink-antikink pairs

Results support Berkovits' superstring field theory accuracy

Abstract

We construct a kink solution on a non-BPS D-brane using Berkovits' formulation of superstring field theory in the level truncation scheme. The tension of the kink reproduces 95% of the expected BPS D-brane tension. We also find a lump-like solution which is interpreted as a kink--antikink pair, and investigate some of its properties. These results may be considered as successful tests of Berkovits' superstring field theory combined with the modified level truncation scheme.