Mathematical Physics and String Theory

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Joint Seminar

This a joint online video seminar series on theoretical and mathematical physics organized together by the ASC and the universities of Heidelberg and Vienna via a BigBlueButton interface.

It will take place on Mondays at 16:15.

If you are interested to participate, please send an email toIlka Brunner.

20.07. Thorsten Schimannek (Vienna U.) "The quantum geometry of genus one fibered Calabi-Yau threefolds"
Abstract: The talk will consist of three parts.
First we are going to review basic notions from topological string theory on general Calabi-Yau threefolds, most notably Gopakumar-Vafa invariants, the stringy Kähler moduli space and topological B-branes. In the second part we are then equipped to discuss the beautiful relation between the enumerative geometry of genus one fibered Calabi-Yau threefolds, certain auto-equivalences of the associated branecategories as well as the theory of weak Jacobi forms.
Finally, we will describe how a particular subset of the enumerative invariants encodes the structure of the fibration and classical techniques from mirror symmetry can be applied to determine the types of reducible fibers. If time permits, we will discuss an example where the corresponding physics via F-theory can then be used to identify transitions to singular Calabi-Yau threefolds with enumerative geometry related to $\Gamma(2)$.


Past seminars
13.07. Thomas Creutzig (Alberta) "Algebraic blow-up"
29.06. Alberto Cattaneo (Zurich) "Hamilton-Jacobi and Quantum Chern-Simons on Cylinders"
22.06 Simone Noja (Como) "On Some Global and Local Problems in Supergeometry"
15.06. Tomas Prochazka (LMU) "Grassmannian VOAs"
08.06. Ingmar Saberi (Heidelberg) "Holomorphic field theories and higher symmetries"
25.05. Christoph Chiaffrino (LMU) “Planar Quantum A-Infinity Algebras”
18.05. Nils Carqueville (Vienna) “An introduction to functorial TQFT with defects”
11.05. Ivo Sachs (LMU) "From BV to string theory and back"