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TT: Fachverband Tiefe Temperaturen

TT 4: Nonequilibrium Quantum Many-Body Systems 1 (joint session TT/DY)

TT 4.9: Vortrag

Montag, 1. April 2019, 11:45–12:00, H22

Heating Dynamics in a Periodically Driven SYK-Model — •Clemens Kuhlenkamp, Simon Weidinger, and Michael Knap — Technische Universität München

Periodically driven quantum matter can realize exotic dynamical phases that do not even exist in equilibrium. In order to understand how ubiquitous and robust these phases are, it is important to understand the heating dynamics of generic interacting quantum systems. We study the thermalization and heating dynamics in a generalized SYK-model subjected to a periodic drive, which realize a Fermi-Liquid (FL) to Non-FL crossover at a certain energy scale. Using an exact field theoretic approach we determine two regimes in the heating dynamics. Only at energies above this crossover scale the system is efficiently thermalizing and heats up exponentially. The crossover in the heating dynamics may be experimentally studied by measuring the absorption of THz laser light that impinges on an irregularly shaped graphene flake in a strong magnetic field, which has been proposed to realize exotic SYK physics.