Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster: Quantum Optics and Photonics II

Q 40.13: Poster

Mittwoch, 8. März 2017, 17:00–19:00, P OG2

Controlling magnetic exchange couplings in periodically driven systems — •Michael Messer, Frederik Görg, Gregor Jotzu, Kilian Sandholzer, Rémi Desbuquois, and Tilman Esslinger — Institute for Quantum Electronics, ETH Zurich, Switzerland

Floquet engineering can be used to implement effective Hamiltonians that reach beyond the Hubbard model. By modulating the lattice position of an interacting system on an array of double wells we implement a Floquet Hamiltonian with controllable magnetic exchange energy. When shaking at a frequency slightly detuned to the interaction energy we can use the shaking amplitude to tune the strength of the magnetic exchange independently of the single particle tunneling. In addition Floquet engineering enables us to switch from static anti-ferromagnetic behavior to a ferromagnetic coupling within our fermionic system. We furthermore implement our scheme for interacting many-body systems and address the question whether experimental timescales are favorable to adiabatically connect states of the driven system to the initial states.