Partially Nondestructive Continuous Detection of Individual Traveling Optical Photons.

  title={Partially Nondestructive Continuous Detection of Individual Traveling Optical Photons.},
  author={Mahdi Hosseini and Kristin M. Beck and Yiheng Duan and Wenlan Chen and Vladan Vuleti{\'c}},
  journal={Physical review letters},
  volume={116 3},
We report the continuous and partially nondestructive measurement of optical photons. For a weak light pulse traveling through a slow-light optical medium (signal), the associated atomic-excitation component is detected by another light beam (probe) with the aid of an optical cavity. We observe strong correlations of g_{sp}^{(2)}=4.4(5) between the transmitted signal and probe photons. The observed (intrinsic) conditional nondestructive quantum efficiency ranges between 13% and 1% (65% and 5… 

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