Dresden 2026 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 17: Decoherence and Open Systems II
QI 17.4: Vortrag
Donnerstag, 12. März 2026, 15:45–16:00, BEY/0137
Exact Floquet dynamics of strongly damped driven quantum systems — •Konrad Mickiewicz1, Valentin Link2, and Walter T. Strunz1 — 1Institut für Theoretische Physik, Technische Universität Dresden, D-01062, Dresden, Germany — 2Institut für Physik und Astronomie, Technische Universität Berlin, D-10623, Berlin, Germany
We introduce an approach for efficiently simulating strongly damped, periodically driven quantum systems [1] using a translationally invariant matrix product operator representation of the influence functional [2]. This allows us to construct a numerically exact Floquet propagator that captures non-Markovian open system dynamics, serving as a dissipative analogue to the Floquet Hamiltonian of isolated periodically driven systems. We apply our method to investigate deviations from equilibrium in spin-boson models by studying the asymptotic reservoir heating. Additionally, we demonstrate that local driving of two qubits can stabilize a transient, environmentally induced buildup of entanglement. Our approach enables a direct analysis of both stationary and transient dynamics in strongly damped, driven quantum systems within a consistent theoretical and computational framework. [1] K. Mickiewicz, V. Link, and W. T. Strunz, arXiv:2511.08754 (2025) [2] V. Link, H.-H. Tu, and W. T. Strunz, Phys. Rev. Lett. 132, 200403 (2024)
Keywords: periodic driving; Floquet open quantum systems; uniTEMPO; tensor networks; spin-boson model