Mainz 2017 – scientific programme
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A: Fachverband Atomphysik
A 25: Ultracold Plasmas and Rydberg Systems (with Q)
A 25.8: Talk
Wednesday, March 8, 2017, 16:30–16:45, P 104
Strong coupling of a Rydberg super atom to a propagating light mode — •Jan Kumlin1, Asaf Paris-Mandoki2, Christoph Braun2, Christoph Tresp2, Sebastian Hofferberth2, and Hans Peter Büchler1 — 1Institut für Theoretische Physik III and Center for Integrated Quantum Science and Technology, Universität Stuttgart, Germany — 25. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart, Germany
Strong coupling of a single atom to a light mode is at the heart of quantum optics. Such systems have so-far been realised experimentally in optical cavities, but recent experimental progress in coupling propagating photons to an atomic cloud with Rydberg states enables the realisation of strong interactions between individual photons in free space and opens up a novel toolbox for quantum optics.
In this talk, we present the exact input-output formalism to describe the phenomenon of collective Rabi oscillations in a single Rydberg two-level superatom coupled to a photon field. The photonic mode defines an effective one-dimensional system, while the large size of the atomic cloud provides a chiral coupling. Using a master equation approach and the quantum regression theorem, we calculate the intensity as well as the second-order correlation function for the outgoing field by numerically solving the quantum master equation. Finally, we compare our findings with recent experimental results.