Spiked Instantons from Intersecting D-branes

TL;DR

This paper explores the moduli space of spiked instantons within the BPS/CFT framework, realized through intersecting D-branes in Type IIB string theory, highlighting the effects of a B-field on tachyon dynamics.

Contribution

It provides a novel string-theoretic realization of spiked instanton moduli spaces via intersecting D-branes and analyzes the impact of B-field-induced tachyon condensation.

Findings

Realization of instanton moduli space through D-brane configurations

Analysis of B-field effects on tachyon condensation

Connection to BPS/CFT correspondence

Abstract

The moduli space of spiked instantons that arises in the context of the BPS/CFT correspondence is realised as the moduli space of classical vacua, i.e. low-energy open string field configurations, of a certain stack of intersecting D1-branes and D5-branes in Type IIB string theory. The presence of a constant B-field induces an interesting dynamics involving the tachyon condensation.