Pinning quantum phase transition of photons in a hollow-core fiber

Details Pinning quantum phase transition of photons in a hollow-core fiber Pinning quantum phase transition of photons in a hollow-core fiber

2011-03-24

arxiv.org/abs/1103.4856v1

Physics

Quantum Physics

4 pages, 4 figures. Comments welcomed

Scientific paper

We show that a pinning quantum phase transition for photons could be observed in a hollow-core one-dimensional fiber loaded with a cold atomic gas. Utilizing the strong light confinement in the fiber, a range of different strongly correlated polaritonic and photonic states, corresponding to both strong and weak interactions can be created and probed. The key ingredient is the creation of a tunable effective lattice potential acting on the interacting polaritonic gas which is possible by slightly modulating the atomic density. We analyze the relevant phase diagram corresponding to the realizable Bose-Hubbard (weak) and sine-Gordon (strong) interacting regimes and conclude by describing the measurement process. The latter consists of mapping the stationary excitations to propagating light pulses whose correlations can be efficiently probed once they exit the fiber using available optical technologies

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