Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster: Quantum Optics and Photonics II

Q 40.12: Poster

Wednesday, March 8, 2017, 17:00–19:00, P OG2

Observing the hierarchy of energy scales in a periodically driven two-body system — •Kilian Sandholzer, Rémi Desbuquois, Michael Messer, Frederik Görg, Gregor Jotzu, and Tilman Esslinger — Institute for Quantum Electronics, ETH Zürich, Zürich, Switzerland

Applying time-periodic potentials is a very useful tool to experimentally realize exotic Hamiltonians. In the framework of Floquet theory the physics is described by slow dynamics of an effective Hamiltonian and the micromotion. By loading a two-component Fermi gas in an array of modulated double-wells we realize a driven building block of the Hubbard model. Measuring the number of doubly occupied sites and the spin-spin correlation the micromotion of the driven system is revealed and compared to theory. Tuning the interaction near to the driving frequency leads to an increased coupling to higher states. Here, we investigate whether the groundstates of the static and effective Hamiltonians are adiabatically connected. We show a regime where we are able to prepare and measure Floquet engineered Hamiltonians beyond the high-frequency expansion in an interacting two-particle system.