Periodic quantum Rabi model with cold atoms at deep strong coupling

• URL: http://arxiv.org/abs/2307.06956v2
• Date: Wed, 10 Jul 2024 14:25:54 GMT
• Title: Periodic quantum Rabi model with cold atoms at deep strong coupling
• Authors: Geram R. Hunanyan, Johannes Koch, Stefanie Moll, Enrique Rico, Enrique Solano, Martin Weitz,
• Abstract summary: We experimentally demonstrate atomic dynamics predicted by the periodic quantum Rabi model far in the deep strong coupling regime. The observed dynamics becomes relevant when the edge of the Brillouin zone is reached.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The quantum Rabi model describes the coupling of a two-state system to a bosonic field mode. Recent theoretical work has pointed out that a generalized periodic version of this model, which maps onto Hamiltonians applicable in superconducting qubit settings, can be quantum simulated with cold trapped atoms. Here, we experimentally demonstrate atomic dynamics predicted by the periodic quantum Rabi model far in the deep strong coupling regime. The two-state system is represented by two Bloch bands of cold atoms in an optical lattice, and the bosonic mode by oscillations in a superimposed optical dipole trap potential. The observed dynamics beyond the usual quantum Rabi physics becomes relevant when the edge of the Brillouin zone is reached, and evidence for collapse and revival of the initial state is revealed at extreme coupling conditions.

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