Gravity enhanced quantum spatial target detection

Abstract

Quantum illumination can utilize entangled light to detect the low-reflectivity target that is hidden in a bright thermal background. This technique is applied to the detection of an object in the curved spacetime of the Earth, in order to explore how the curvature of spacetime affects quantum illumination. It is found that the spatial quantum illumination with entangled state transmitter outperforms that with coherent-state transmitter in the near-Earth curved spacetime. Moreover, either the quantum illumination system or the coherent-state system is employed, and gravity can enhance the spacetime target detection by reducing the thermal signal at the receiver. Besides, our model in principle can be applied to microwave quantum illumination and thus provides, to some degree, a theoretical foundation for the upcoming spatial quantum radar technologies.

16 pages, 4 figures

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Cited by in corpus (5)

• Gaussian tripartite steering in Schwarzschild black hole
• Generation of quantum entanglement in superposed diamond spacetime
• Quantum properties of fermionic fields in multi-event horizon spacetime
• System-environment dynamics of GHZ-like states in noninertial frames
• Entanglement-enhanced quantum ranging in the near-Earth spacetime