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Q: Fachverband Quantenoptik und Photonik

Q 8: Quantum Gases (Bosons) II

Q 8.7: Talk

Monday, March 14, 2022, 18:00–18:15, Q-H10

A Kapitza Pendulum for Ultracold Atoms — •Erik Bernhart, Jian Jiang, Marvin Röhrle, Jens Benary, Marvin Beck, Christian Baals, and Herwig Ott — Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany

We present the experimental realization of a Kapitza pendulum for ultacold ⁸⁷Rb atoms.

Our experiment shows how a periodic modulation of the potential can lead to dynamical stabilization of the atomic motion in an otherwise unstable potential. While the time average of the modulated potential vanishes, the corresponding Floquet Hamiltonian results in an effective time independent potential, which traps the atoms.

In our experiment we create the Kapitza pendulum by two time modulated Gaussian shaped laser beams, which generate an attractive and repulsive potential. We analyze the lifetime and the stability of the trap, depending on the driving frequency of the potentials.