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DY: Fachverband Dynamik und Statistische Physik
DY 16: Nonequilibrium Quantum Systems 1 (joint session TT/DY)
DY 16.12: Talk
Tuesday, March 19, 2024, 12:30–12:45, H 3005
Periodically Driven Spin-1/2 XXZ Antiferromagnetic Chains — •Dominic Windecker1, Aslam Parvej2, and Sebastian Eggert1 — 1University of Kaiserslautern-Landau, Landesforschungszentrum OPTIMAS — 2Universität Hamburg
Time-periodically driven quantum systems are of great interest due the possibility of unconventional states of matter and Floquet engineering. The interplay of many-body interactions and time-periodic manipulations facilitate new phenomena in the steady state. We analyze the Floquet steady states of finite spin-1/2 XXZ antiferromagnetic chains with periodically driven anisotropy parameter at frequencies below the band width, so that resonances are in principle possible. We use three different numerical real-time approaches (TS1, TS2 and RK4) with an adiabatic time-evolution protocol by ramping up the driving amplitude of the external periodic drive to prepare a non-equilibrium Floquet steady state. Stability, accessibility, preparation and characteristics of parametric resonance states in finite systems are discussed.
Keywords: Floquet theory; Parametric resonances; XXZ Spin chain; time-dependent simulations; non-equilibrium numerics