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Seminar

EGN Main Seminar: Four-dimensional BPS states in the E6 theory May 04, 2018 (02:00 PM PDT - 03:00 PM PDT)
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Location: MSRI: Simons Auditorium
Speaker(s) Lotte Hollands (Heriot-Watt University, Riccarton Campus)
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BPS states in four-dimensional N=2 theories are enumerated by spectral networks on two-dimensional Riemann surfaces. Geometrically they correspond to special Lagrangian discs ending on the spectral networks, more formally they are (conjectured to be) generalised Donaldson-Thomas invariants for an appropriate CY3 category. In this talk I will give a particularly interesting example of these BPS state counts in the E6 Minahan-Nemeschansky theory, where the relevant spectral networks are generated by generalised Strebel differentials. This is joint work with Andrew Neitzke.

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