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2025-10-14 (Tuesday)
join us at 16:15  Calendar icon
Yoon Seok Chae (UC Davis)

Knots, series invariant and supergroup Chern-Simons theory

Topological quantum field theory (TQFT) has been a fruitful source ofinteractions between physics and topology. A classical example is thethree dimensional Chern-Simons theory from the 1980's. It yieldstopological invariants of links and three manifolds. In case of thelatter invariant, it was shown more recently that the invariant admitsa decomposition into a series invariant, which is a partition functionof a 3-dimensional (supersymmetric) QFT. This series invariant waslater generalized to a series invariant of knots. This motivated anextension of the series invariant of 3-manifolds to Lie supergroups,whose underlying physical theory is the supergroup Chern-Simonstheory. This result was recently generalized to knots.In this talk, we review the original series invariants and introducethe recent generalization, and explore its properties and examples.https://uw-edu-pl.zoom.us/j/96227261664?pwd=6XSohvXIkXoEalbPcswHlPh1kd2UG8.1
2025-10-06 (Monday)
room 2.25, Pasteura 5 at 14:15  Calendar icon
Michał P. Heller (Ghent University and Jagiellonian University)

Insights into the microscopics of holographic complexity

I will discuss what the correspondence between a ’t Hooft-like limit of the Sachdev-Ye-Kitaev model and gravity teaches us about the microscopic interpretation of holographic complexity. Based on 2412.17785 (PRL in print) and work in progress.
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