SAMOP 2021 – scientific programme
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A: Fachverband Atomphysik
A 16: Ultra-cold atoms, ions, and BEC (joint session A/Q)
A 16.10: Poster
Wednesday, September 22, 2021, 16:30–18:30, P
Simulation of the Quantum Rabi Model in the Deep Strong-Coupling Regime with Ultracold Rubidium Atoms — •Stefanie Moll1, Geram Hunanyan1, Johannes Koch1, Martin Leder1, Enrique Rico2, Enrique Solano2, and Martin Weitz1 — 1University of Bonn, Bonn, Germany — 2University of the Basque Country, Bilbao, Spain
When considering light-matter interaction with a magnitude of the coupling strength that approaches the optical resonance frequency, one enters the deep strong-coupling regime, where the approximations of the Jaynes Cummings Model do not hold anymore. Theory has predicted non-intuitive dynamics in the limit of the full QRM-Hamiltonian becoming applicable.
Our experimental implementation of the quantum Rabi model uses ultracold rubidium atoms in an 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 the oscillations of the atoms in an optical dipole trapping potential.
We observe atomic dynamics in the deep strong-coupling regime, yielding high excitation numbers of the oscillator modes being created out of the vacuum. The current status of experimental results will be presented.