Dresden 2017 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 15: Quantum Dynamics, Decoherence, Quantum Information

DY 15.8: Vortrag

Dienstag, 21. März 2017, 11:30–11:45, ZEU 160

Driven open quantum systems and Floquet stroboscopic dynamics — •Sebastian Restrepo¹, Javier Cerrillo¹, Victor M. Bastidas², Dimitri Angelakis², and Tobias Brandes¹ — ¹Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany — ²Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore

We provide an analytic solution to the problem of driven open quantum systems at the high-frequency limit that goes beyond the weak coupling and Markovian assumptions. It may be applied to a large class of driven-dissipative many-body systems, since it solely relies on discrete symmetries of the system-bath Hamiltonian and provides the time evolution operator of the full Hilbert space, including bath degrees of freedom. This facilitates exploration of the effects of the driving both on the coherent part of the dynamics and also on the environment (dissipation). Due to the possibility to address strong-coupling and non-Markovian regimes, the latter may involve largely unexplored, highly complex effects. They may be interpreted in terms of the stroboscopic evolution of a continuous family of observables under the influence of an effective static Hamiltonian, which can in turn be regarded as a flexible simulation procedure of non-trivial static Hamiltonians. We instantiate the result with the study of the spin-boson model with time-dependent tunneling amplitude and provide observations of simulated polaron dynamics in the strong coupling limit.