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Superconformal Vortex Strings
David Tong
We study the low-energy dynamics of semi-classical vortex strings living above Argyres-Douglas superconformal field theories. The worldsheet theory of the string is shown to be a d…
Aspects of Non-Abelian Gauge Dynamics in Two-Dimensional N=(2,2) Theories
Kentaro Hori, David Tong
We study various aspects of N=(2,2) supersymmetric non-Abelian gauge theories in two dimensions, with applications to string vacua. We compute the Witten index of SU(k) SQCD with N…
Instantons and Emergent AdS_3 x S^3 Geometry
Heng-Yu Chen, David Tong
Two dimensional N=(4,4) gauge theories flow to interacting superconformal field theories on their Higgs branch. We examine worldsheet instantons in these theories through the eyes…
D-Branes in Field Theory
David Tong
Certain gauge theories in four dimensions are known to admit semi-classical D-brane solitons. These are domain walls on which vortex flux tubes may end. The purpose of this paper i…