Quantum illumination with Gaussian states.

@article{Tan2008QuantumIW,
  title={Quantum illumination with Gaussian states.},
  author={Si-Hui Tan and Baris I. Erkmen and Vittorio Giovannetti and Saikat Guha and Seth Lloyd and Lorenzo Maccone and Stefano Pirandola and Jeffrey H. Shapiro},
  journal={Physical review letters},
  year={2008},
  volume={101 25},
  pages={
          253601
        }
}
An optical transmitter irradiates a target region containing a bright thermal-noise bath in which a low-reflectivity object might be embedded. The light received from this region is used to decide whether the object is present or absent. The performance achieved using a coherent-state transmitter is compared with that of a quantum-illumination transmitter, i.e., one that employs the signal beam obtained from spontaneous parametric down-conversion. By making the optimum joint measurement on the… 

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