Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 46: Quantum Gases: Fermions I

Q 46.2: Vortrag

Donnerstag, 9. März 2017, 11:30–11:45, P 204

Floquet engineering of a two-body system in an array of double wells — •Michael Messer, Rémi Desbuquois, Frederik Görg, Kilian Sandholzer, Gregor Jotzu, and Tilman Esslinger — Institute for Quantum Electronics, ETH Zurich, Switzerland

Periodically driving a system of ultracold fermions in an optical lattice allows for implementing a large variety of effective Hamiltonians through Floquet engineering. A crucial question is whether this method can be extended to interacting systems. By driving a two-body system on an array of double wells we measure the double occupancy and the spin-spin correlator as a function of shaking frequency and strength. We analyze the importance of micromotion to describe the exact time evolution of the system and compare it to numerical theory. In addition we investigate the experimental timescales needed to adiabatically connect the emerging states of the driven system to states of the initial Hamiltonian. We find an adiabatic regime in which the double occupancy and spin-spin correlations of the Floquet Hamiltonian can be exactly compared to theory. This hierarchy of different energy scales allows us to implement driven systems with strong interactions.