Title: A string-inspired SYK model and some 4d black hole phenomenology

Abstract: String compactifications to four dimensions provide us with very rich quantum systems with couplings determined by Calabi-Yau data. For very complicated Calabi-Yau manifolds these couplings can be treated as a disorder, similar to the disordered couplings in SYK. We show that these systems admit an emergent SL(2,R)-invariant IR fixed-point at large N upon disorder averaging. The global symmetry of our system is SO(3) and we show that there exist marginal deformations that break the SO(3) but preserve the SL(2,R) in the IR. We connect this to the phenomenology of charged rotating extremal black holes in four dimensions.