Box Graphs and Resolutions II: From Coulomb Phases to Fiber Faces

TL;DR

This paper explores the relationship between box graphs, Coulomb phases, and crepant resolutions of elliptic fibrations, providing explicit geometric realizations and confirming flop transition predictions.

Contribution

It establishes a correspondence between box graphs for su(2k+1) gauge algebras and toric top resolutions, confirming flop transitions match predictions.

Findings

Box graphs predict organization of phases via flop transitions.

Explicit geometric realizations of box graph resolutions are provided.

Flop transitions between resolutions agree with box graph predictions.

Abstract

Box graphs, or equivalently Coulomb phases of three-dimensional N=2 supersymmetric gauge theories with matter, give a succinct, comprehensive and elegant characterization of crepant resolutions of singular elliptically fibered varieties. Furthermore, the box graphs predict that the phases are organized in terms of a network of flop transitions. The geometric construction of the resolutions associated to the phases is, however, a difficult problem. Here, we identify a correspondence between box graphs for the gauge algebras su(2k+1) with resolutions obtained using toric tops and generalizations thereof. Moreover, flop transitions between different such resolutions agree with those predicted by the box graphs. Our results thereby provide explicit realizations of the box graph resolutions.