Noncommutative Tachyons And String Field Theory

TL;DR

This paper explores how large noncommutativity simplifies tachyon condensation in string theory by analyzing the factorization of string field algebra in the presence of a strong B-field.

Contribution

It demonstrates from string field theory that in the large B-field limit, the string field algebra separates into simpler components, clarifying the role of noncommutativity.

Findings

String field algebra factorizes into center-of-mass and other degrees of freedom.

Large B-field limit simplifies the description of tachyon condensation.

Supports the view that noncommutativity aids in understanding string dynamics.

Abstract

It has been shown recently that by turning on a large noncommutativity parameter, the description of tachyon condensation in string theory can be drastically simplified. We reconsider these issues from the standpoint of string field theory, showing that, from this point of view, the key fact is that in the limit of a large B-field, the string field algebra factors as the product of an algebra that acts on the string center of mass only and an algebra that acts on all other degrees of freedom carried by the string.