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Chernoff Information Bottleneck for Covert Quantum Target Sensing.

Giuseppe Ortolano1,2, Ivano Ruo-Berchera3, Leonardo Banchi1,2

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Summary
This summary is machine-generated.

Quantum sensing offers a unique advantage for covert detection and ranging by using entangled photons. This quantum approach enhances secrecy and performance, outperforming classical methods in adversarial scenarios.

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Area of Science:

  • Quantum physics
  • Quantum sensing
  • Information theory

Background:

  • Quantum metrology and sensing seeks precision advantages at fixed probe energy.
  • Classical probes are often simpler but less suitable for covert operations.
  • High energy in classical probes aids adversaries, compromising secrecy.

Purpose of the Study:

  • To introduce a framework for assessing quantum advantage in covert sensing.
  • To extend the information bottleneck principle to decision problems using Chernoff information.
  • To compare quantum and classical covert sensing performance.

Main Methods:

  • Developed a general framework for covert quantum advantage assessment.
  • Extended the information bottleneck principle using Chernoff information.
  • Utilized entangled photonic probes and photon counting.

Main Results:

  • Entangled photonic probes significantly outperform classical coherent transmitters in covert detection and ranging.
  • Quantum sensing provides a crucial advantage for maintaining secrecy in adversarial environments.
  • Photon counting enhances the performance of quantum covert sensing.

Conclusions:

  • Quantum sensing is essential for covert operations where classical methods fail.
  • Integrating quantum sensing into lidar and radar systems can significantly enhance covert performance.
  • Entangled photonic probes represent a key technology for future covert sensing applications.