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Collective resonance displacement in strongly driven cold atoms
Mateus A. F. Biscassi, Robin Kaiser, Mathilde Hugbart, Romain Bachelard·September 15, 2025
Atomic PhysicsQuantum Physics
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Abstract
Cold atoms are promising platforms for metrology and quantum computation, yet their many-body dynamics remains largely unexplored. We here investigate Rabi oscillations from optically-thick cold clouds, driven by high-intensity coherent light. A dynamical displacement from the atomic resonance is predicted, which can be detected through the collective Rabi oscillations of the atomic ensemble. Different from linear-optics shifts, this dynamical displacement grows quadratically with the optical depth, yet it reduces with increasing pump power as dipole-dipole interactions are less effective.