Martí Rosselló (Lisboa): Rademacher expansion from symplectic symmetries of the Siegel modular form: An $N=4$ counting story

Dienstag, 30. November 2021 14:00

Zoom Meeting: tuwien.zoom.us/j/97641048733 Password: uYTuX81c

Single centred 1/4 BPS degeneracies in four-dimensional $N=4$ heterotic string theory are generated by $1/\Phi_{10}$. In this talk, we will demonstrate how its $Sp(2,\mathbb{Z})$ symmetries enable us to develop not only a Rademacher expansion for these degeneracies, but also derive the explicit structure underlying the polar states that feed into the expansion. Our results have important implications for using microscopic data to exactly compute gravity path integrals.

 

 

Foto: Barbara Mair