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arXiv · 1905.07353

Observation of Multimode Strong Coupling of Cold Atoms to a 30-m Long Optical Resonator

Aisling Johnson·Martin Blaha·Alexander E. Ulanov·Arno Rauschenbeutel·Philipp Schneeweiss·Jürgen Volz
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Abstract

We report on the observation of multimode strong coupling of a small ensemble of atoms interacting with the field of a 30-m long fiber resonator containing a nanofiber section. The collective light--matter coupling strength exceeds the free spectral range and the atoms couple to consecutive longitudinal resonator modes. The measured transmission spectra of the coupled atom-resonator system provide evidence of this regime, realized with a few hundred atoms with an intrinsic single-atom cooperativity of 0.26. These results are the starting point for studies in a new setting of light-matter interaction, with strong quantum non-linearities and a new type of dynamics.

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Aisling Johnson, Martin Blaha, Alexander E. Ulanov, Arno Rauschenbeutel, Philipp Schneeweiss, Jürgen Volz. 2019-05-17. Observation of Multimode Strong Coupling of Cold Atoms to a 30-m Long Optical Resonator. https://doi.org/10.1103/physrevlett.123.243602

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