Erlangen 2026 – wissenschaftliches Programm
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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik
MP 6: Holography: AdS/CFT
MP 6.3: Vortrag
Mittwoch, 18. März 2026, 16:45–17:00, KH 02.013
Deformations of the Chiral SYK Model and its Gravity Dual — Dmitry Bagrets2, Konstantin Weisenberger1, and •Sarina Michael1 — 1Universität zu Köln, Zülpicher Straße 77, 50937 Köln — 2Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52428 Jülich
Based on previous work [Altland2025], we construct an extension of the (1+1)-dimensional chiral SYK model, which provides a microscopic realization of a maximally chaotic yet exactly solvable system, and also it turned out to be the holographic dual of a BTZ black hole. In the deep infrared, both are governed by a generalization of the Schwarzian theory, the Alekseev-Shatashvili (AS) action, which captures the dynamics of soft-mode fluctuations. On the gravity side, we include rotating BTZ geometries, giving a split into left- and right-moving temperatures in the dual CFT, and we add fermions on this background to find the boundary correlators. We rederive these also from pure AdS3 via diffeomorphisms and extend this construction to genuinely off-shell boundary reparametrizations. On the CFT side, we study a bilocal deformation of the IR description using renormalization-group methods and show that it induces a crossover in the power law of the propagator, leading to a phase diagram with a critical line separating the two regimes.
Keywords: Holography; AdS/CFT correspondence; SYK Model; BTZ Black Holes; Quantum Field Theory