SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 47: Quantum-Critical Phenomena

TT 47.12: Vortrag

Donnerstag, 30. März 2023, 12:30–12:45, HSZ 204

Renormalization group flow of the Yukawa-SYK model — •Niklas Cichutek and Peter Kopietz — Goethe University Frankfurt

We use the functional renormalization group to calculate the global renormalization group flow of the Yukawa-SYK model describing N fermions on a quantum dot which are coupled to M phonons by a disorder-induced Yukawa coupling in the large N and M limit for an arbitrary ratio N/M. By determining the fixed-point structure we identify the different phases as well as the quantum critical point and their corresponding anomalous dimensions. The stability analysis of the fixed points sheds light on the self-tuning to criticality of the Yukawa-SYK model.