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Frequency downconversion for a quantum network
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DOI：10.1364/OL.35.002591.png)
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Abstract
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By using a parametric downconversion process with a strong signal field injection, we demonstrate coherent frequency downconversion from a pump photon to an idler photon. Contrary to a common misunderstanding, we show that the process can be free of quantum noise. With an interference experiment, we demonstrate that the coherence is preserved in the conversion process. This may lead to a high-fidelity quantum state transfer from a high-frequency photon to a low-frequency photon and connects a missing link in a quantum network. With this scheme of coherent frequency downconversion of photons, we propose a method of single-photon WDM. (C) 2010 Optical Society of America
Keywords:
SINGLE-PHOTON DETECTION
UP-CONVERSION
NOISE
COMMUNICATION
ENTANGLEMENT
STORAGE
LIGHT
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IF:
3.3
Papers:
4.0W
Citations:
7.6W
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