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arXiv · 1001.1677

Excitations of strongly correlated polaritons

S. Schmidt·G. Blatter
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Abstract

We use an analytic slave-boson approach to calculate the elementary excitations of the Jaynes-Cummings-Hubbard Model (JCHM) describing strongly correlated polaritons on a lattice in various quantum optical systems. In the superfluid phase near the Mott transition we find a gapless, linear Goldstone mode and a gapped Amplitude mode corresponding to phase and density fluctuations, respectively. The sound velocity of the Goldstone mode develops a peculiar anomaly as a function of detuning at low densities, which persists into the weakly interacting regime of a polariton BEC.

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S. Schmidt, G. Blatter. 2010-05-31. Excitations of strongly correlated polaritons. https://doi.org/10.1103/physrevlett.104.216402

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