Experimental Quantum Target Detection Approaching the Fundamental Helstrom Limit.

  title={Experimental Quantum Target Detection Approaching the Fundamental Helstrom Limit.},
  author={Feixiang Xu and Xiao-Ming Zhang and Liang Xu and Tao Jiang and Man-Hong Yung and Lijian Zhang},
  journal={Physical review letters},
  volume={127 4},
Quantum target detection is an emerging application that utilizes entanglement to enhance the sensing of the presence of an object. Although several experimental demonstrations for certain situations have been reported recently, the single-shot detection limit imposed by the Helstrom limit has not been reached because of the unknown optimum measurements. Here we report an experimental demonstration of quantum target detection, also known as quantum illumination, in the single-photon limit. In… 

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