Photonic quantum transport in a nonlinear optical fiber
arXiv:0907.5206 · doi:10.1209/0295-5075/94/54006
Abstract
We theoretically study the transmission of few-photon quantum fields through a strongly nonlinear optical medium. We develop a general approach to investigate non-equilibrium quantum transport of bosonic fields through a finite-size nonlinear medium and apply it to a recently demonstrated experimental system where cold atoms are loaded in a hollow-core optical fiber. We show that when the interaction between photons is effectively repulsive, the system acts as a single-photon switch. In the case of attractive interaction, the system can exhibit either anti-bunching or bunching, associated with the resonant excitation of bound states of photons by the input field. These effects can be observed by probing statistics of photons transmitted through the nonlinear fiber.
5 pages, 4 figures, V2: some changes in the presentation (mainly introduction and references), last part is removed to shorten the paper
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