Rozansky-Witten models as extended defect TQFTs

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• Daniel Roggenkamp (Max Planck Institute for Mathematics in the Sciences)
• Monday 22 September 2025, 10:00-11:30
• Seminar Room 2, Newton Institute.

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BID - Quantum field theory with boundaries, impurities, and defects

Few examples of extended TQF Ts are known explicitly. In this talk I will discuss a very explicit construction of the extended TQF Ts associated to Rozanksy-Witten models with affine target spaces. I will furthermore explain how to incorporate defects into the extended TQF Ts. This can be used for instance to derive the Hilbert spaces of affine Rozansky-Witten models associated to surfaces with arbitrary insertions of defect networks.

This talk is part of the Isaac Newton Institute Seminar Series series.

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