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Q: Fachverband Quantenoptik und Photonik

Q 25: Quantum gases (Bosons) IV

Q 25.5: Vortrag

Mittwoch, 11. März 2020, 12:00–12:15, e214

Realizing the Deep Strong Coupling Regime of the Quantum Rabi Model with Ultracold Rubidium Atoms — •Geram Hunanyan, Johannes Koch, and Martin Weitz — Institut für Angewandte Physik Bonn

The dynamics of a two-level system interacting with a single bosonic mode is well described by the quantum Rabi model (QRM). Although a fair quantity of experiments explore the strong coupling regime of the QRM, where due to limited coupling strength the widely known Jaynes-Cummings model breaks down, researchers are just beginning to exploit the regime where the full QRM must be considered. Our experimental implementation to simulate the full QRM uses ultracold rubidium atoms in a 1D optical lattice potential, with the effective two-level quantum system being realized by different Bloch bands in the first Brillouin zone. The bosonic mode is represented by a vibrational mode of atoms oscillating in an optical dipole trapping potential. We experimentally observe the atomic dynamics in the deep strong coupling regime. The present status of experimental results will be presented.