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Bulletin of the American Physical Society

Distinct single photons strongly interacting at a single atom in a waveguide

Pavel Kolchin, Rupert F. Oulton, Xiang Zhang

Published Mar 21, 2011• 0 citations
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Publisher’s Note: Nonlinear Quantum Optics in a Waveguide: Distinct Single Photons Strongly Interacting at the Single Atom Level [Phys. Rev. Lett.106, 113601 (2011)]

Pavel Kolchin, Rupert F. Oulton, Xiang Zhang

Received 18 March 2011DOI:https://doi.org/10.1103/PhysRevLett.106.139902© 2011 American Physical Society

Physical Review Letters•Mar 31, 2011•0 citations
We propose a waveguide-QED system where two single photons of distinct frequency or polarization interact strongly. The system consists of a single ladder-type three level atom coupled to a waveguide. When both optical transitions are coupled strongly to the waveguide's mode, we show that a control photon tuned to the upper transition induces a π phase shift and tunneling of a probe photon tuned to the otherwise reflective lower transition. Furthermore, the system exhibits single photon scattering by a classical control beam. Waveguide-QED schemes could be an alternative to high quality cavities or dense atomic ensembles in quantum information processing.