Dr
Evgeny Skvortsov
(AEI, Potsdam)
25/09/2019, 14:00
String & Mathematical Physics
Three-dimensional bosonization duality is one of the remarkable dualities discovered recently in three-dimensional conformal field theories. At least in the large-N limit the duality is tightly linked to higher spin symmetries and, therefore, to Higher Spin Gravities that are AdS/CFT dual to these CFT's.
We propose a new approach to solve conformal field theories and apply it to the...
Dr
Andreas Braun
(University of Oxford)
25/09/2019, 14:20
String & Mathematical Physics
I will review recent progress in the role of G2 manifolds in various
string dualities. This includes the dualities between heterotic strings,
type IIA and M-Theory, as well as mirror symmetries for type II strings.
Dr
Guglielmo Lockhart
(University of Amsterdam)
25/09/2019, 14:40
String & Mathematical Physics
In the pure spinor formulation of the superstring, in addition to the spacetime bosons and fermions the string worldsheet theory includes a ghost sector described by pure spinor fields. I will discuss the existence of a hidden action of an affine E6 Lie algebra on this sector, which arises from enhancement of SO(10) spacetime rotations together with a U(1) ghost symmetry, and whose...
Dr
Markus Dierigl
(Utrecht University)
25/09/2019, 15:00
String & Mathematical Physics
In this talk we will investigate the Swampland Distance Conjecture in type IIB string theory compactified on K3 x T2. As conjectured one indeed finds a tower of exponentially light states using the Hodge-Deligne splitting of the middle homology in the degeneration limit. This tower, however, consists of quarter-BPS states, which can potentially decay into a pair of half-BPS states at walls of...
Dr
Thorsten Schimannek
(University of Vienna)
25/09/2019, 15:20
String & Mathematical Physics
We discuss the relation between certain auto-equivalences of the category of B-branes on elliptic Calabi-Yau threefolds and modular properties of the corresponding topological string partition function.
This suggests a geometric explanation and generalization of recent conjectures on the appearance of lattice Jacobi forms.
In particular, we will shed light on the special case where the...
Ms
Urmi Ninad
(Doctoral student)
25/09/2019, 15:40
String & Mathematical Physics
We analyse certain 2d supersymmetric gauge theories (GLSMs) with a boundary which in the IR flow to SCFTs that are relevant for string compactifications with D-branes. Certain non-abelian GLSMs exhibit Seiberg-like dualities which relate seemingly different UV gauge theories with the same IR physics. We extend the analysis of such dualities to theories with boundaries and propose the action of...