Enhanced Sensitivity of Photodetection via Quantum Illumination

  title={Enhanced Sensitivity of Photodetection via Quantum Illumination},
  author={Seth Lloyd},
  pages={1463 - 1465}
  • S. Lloyd
  • Published 12 September 2008
  • Physics
  • Science
The use of quantum-mechanically entangled light to illuminate objects can provide substantial enhancements over unentangled light for detecting and imaging those objects in the presence of high levels of noise and loss. Each signal sent out is entangled with an ancilla, which is retained. Detection takes place via an entangling measurement on the returning signal together with the ancilla. This paper shows that for photodetection, quantum illumination with m bits of entanglement can in… 

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