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Q: Fachverband Quantenoptik und Photonik

Q 48: Quantum Effects II

Q 48.4: Talk

Thursday, March 17, 2022, 11:15–11:30, Q-H13

Nonequilibrium quantum state preparation with Floquet systems in engineered baths — •Francesco Petiziol and André Eckardt — Technische Universität Berlin, Institut für Theoretische Physik, Hardenbergstr. 36, 10623 Berlin, Germany

I will discuss how interesting nonequilibrium quantum states can be prepared and stabilized by combining time-periodic driving with engineered quantum baths, as they are realizable in circuit QED systems. Considering arrays of periodically driven artificial atoms individually coupled to leaky cavities, I will first show that, while the periodic driving allows to engineer desired effective system properties, the cavities can be exploited to cool the systems to their effective ground states. I will illustrate how this mechanism can be used for the robust preparation of states with non-trivial properties. Concretely, I will discuss the preparation of Aharonov-Bohm cages, in which quantum interference constrains the dynamics in small subsystems, and chiral ground state currents.