7–11 Jul 2025
Northeastern University
US/Eastern timezone

Emergent Strings in type IIb limits of Type IIB String Theory

10 Jul 2025, 15:30
17m
ISEC (Northeastern University)

ISEC

Northeastern University

Interdisciplinary Science & Engineering Complex (ISEC) 805 Columbus Ave, Boston, MA 02120

Speaker

Jeroen Monnee

Description

We discuss the realization of the Emergent String Conjecture in certain infinite distance limits in the vector multiplet moduli space of Type IIB compactifications on Calabi-Yau threefolds. We establish the existence of a critical tensionless string corresponding to a heterotic string on T^2 x K3, in limits of type IIb that correspond to so-called Tyurin degenerations. We do so by combining the properties of the low-energy effective theory as captured in terms of the underlying limiting mixed Hodge structure, as well as the precise geometric degeneration of the Calabi-Yau threefold as described in terms of the underlying geometric mixed Hodge structure.

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