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Michele Cirafici, CAMGSD

Line defects and framed BPS quivers

The spectrum of BPS states of \(N=2\) supersymmetric gauge theories has a subtle moduli dependence. The moduli space is divided in chambers and across chambers the spectrum jumps according to a wall-crossing formula. In certain chambers the whole spectrum can be generated via a so-called BPS quiver. We use a simple modification of this quiver to characterize line defects by studying which BPS states can form a bound state with the defect.