Strings between branes
Koji Hashimoto (Univ. of Tokyo), Washington Taylor (MIT)

TL;DR
This paper constructs classical solutions in Yang-Mills theory representing D-branes with fundamental strings stretching between them, providing insights into string junctions, networks, and tachyon condensation.
Contribution
It introduces a non-abelian Yang-Mills framework to model fundamental strings between D-branes and analyzes related monopoles, offering a new classical perspective on string configurations.
Findings
String charge density supported between D-branes
Smooth resolutions of string junctions and networks
Insights into tachyon condensation in Yang-Mills limit
Abstract
D-brane configurations containing fundamental strings are constructed as classical solutions of Yang-Mills theory. The fundamental strings in these systems stretch between D-branes. In the case of D1-branes, this construction gives smooth (classical) resolutions of string junctions and string networks. Using a non-abelian Yang-Mills analysis of the string current, the string charge density is computed and is shown to have support in the region between the D-brane world-volumes. The 't Hooft-Polyakov monopole is analyzed using similar methods, and is shown to contain D-strings whose flux has support off the D-brane world-volume defined by the Higgs scalar field, when this field is interpreted in terms of a transverse dimension. The constructions presented here are used to give a qualitative picture of tachyon condensation in the Yang-Mills limit, where fundamental strings and…
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