Many-body braiding phases in a rotating strongly correlated photon gas |
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Authors: | RO Umucalılar I Carusotto |
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Institution: | INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, I-38123 Povo, Italy |
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Abstract: | We present a theoretical study of fractional quantum Hall physics in a rotating gas of strongly interacting photons in a single cavity with a large optical nonlinearity. Photons are injected into the cavity by a Laguerre–Gauss laser beam with a non-zero orbital angular momentum. The Laughlin-like few-photon eigenstates appear as sharp resonances in the transmission spectra. Using additional localized repulsive potentials, quasi-holes can be created in the photon gas and then braided around in space: an unambiguous signature of the many-body Berry phase under exchange of two quasi-holes is observed as a spectral shift of the corresponding transmission resonance. |
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Keywords: | Strongly interacting photons Fractional quantum Hall effect Berry phase |
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