Tuesday, August 6, 2013

1308.1032 (F. M. Marchetti et al.)

Collective pairing of resonantly coupled microcavity polaritons    [PDF]

F. M. Marchetti, J. Keeling
We consider the collective behavior of microcavity polaritons tuned near a bipolariton Feshbach resonance. We show that as well as the regular polariton superfluid phase a "molecular" superfluid phase exists, with (quasi-)long-range order only for pairs of polaritons. We describe the experimental signatures of this phase. Using variational approaches we find the phase diagram (critical temperature, density and exciton-photon detuning). Unlike ultracold atoms, the molecular superfluid phase is not inherently unstable, and our phase diagram suggests it is attainable in current experiments.
View original: http://arxiv.org/abs/1308.1032

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