期刊
PHYSICAL REVIEW LETTERS
卷 106, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.113601
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资金
- U.S. DOE [DE-AC02-05CH11231]
- NSF Nano-scale Science and Engineering Center [CMMI-0751621]
- EPSRC [EP/I004343/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I004343/1] Funding Source: researchfish
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 pi 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.
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