D-branes and Strings as Non-commutative Solitons

TL;DR

This paper demonstrates how D-branes and fundamental strings can be modeled as non-commutative solitons within string field theory, leveraging non-commutative geometry to derive exact tensions and gauge structures.

Contribution

It introduces a method to construct D-branes and strings as non-commutative solitons, providing exact tension calculations and insights into gauge field structures.

Findings

D-branes are realized as non-commutative solitons.

Fundamental strings are modeled as localized flux tubes.

Exact tensions are derived using non-BPS brane properties.

Abstract

The non-commutative geometry of a large auxiliary $B$-field simplifies the construction of D-branes as solitons in open string field theory. Similarly, fundamental strings are constructed as localized flux tubes in the string field theory. Tensions are determined exactly using general properties of non-BPS branes, and the non-Abelian structure of gauge fields on coincident D-branes is recovered.