Tensionless Branes and Discrete Gauge Symmetry

TL;DR

This paper demonstrates that tensionless branes on non-BPS D-branes are gauge equivalent to the vacuum via a discrete symmetry and provides a construction of D(2p)-branes from a single non-BPS D9-brane.

Contribution

It reveals the gauge equivalence of tensionless branes to the vacuum and offers a new method to construct D(2p)-branes from a single non-BPS D9-brane.

Findings

Tensionless branes are gauge equivalent to the vacuum.

A simple construction of D(2p)-branes from a non-BPS D9-brane.

Identification of discrete gauge symmetry in non-commutative field theory.

Abstract

We show that the tensionless branes found recently on non-BPS D-branes using non-commutative field theory are in fact gauge equivalent to the vacuum under a discrete gauge symmetry. We also give a simple construction of the D(2p)-branes in IIA theory starting from a single non-BPS D9-brane.