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Authors: S. Hofferberth, T. Peyronel, Q. Liang, A.S. Zibrov, V.Vuletic, M. Lukin
Realization of optical nonlinearities at the single-photon level is a long-standing goal in optical science. Typically, interactions of light beams in nonlinear media are very weak at low light levels. Strong interactions between few-photon pulses require a combination of large optical nonlinearity, long interaction time, low photon loss, and tight confinement of the light beams. Here, we present an approach to overcome these issues that makes use of an optically dense medium containing a few hundred cold atoms trapped inside the hollow core of a photonic crystal fiber. We show results of recent experiments regarding few-photon all-optical switching and stationary light pulses inside the fiber. |
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