Noisy receivers for quantum illumination
arXiv:2006.04772 · doi:10.1109/MAES.2020.3004019
Abstract
Quantum illumination (QI) promises unprecedented performances in target detection but there are various problems surrounding its implementation. Where target ranging is a concern, signal and idler recombination forms a crucial barrier to the protocol's success. This could potentially be mitigated if performing a measurement on the idler mode could still yield a quantum advantage. In this paper we investigate the QI protocol for a generically correlated Gaussian source and study the phase-conjugating (PC) receiver, deriving the associated SNR in terms of the signal and idler energies, and their cross-correlations, which may be readily adapted to incorporate added noise due to Gaussian measurements. We confirm that a heterodyne measurement performed on the idler mode leads to a performance which asymptotically approaches that of a coherent state with homodyne detection. However, if the signal mode is affected by heterodyne but the idler mode is maintained clean, the performance asymptotically approaches that of the PC receiver without any added noise.
arXiv comment15 pages, 2 figures
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- Quantum Illumination and Quantum Radar: A Brief Overview
- Experimental Quantum Target Detection Approaching the Fundamental Helstrom Limit
- Quantum illumination receiver using double homodyne detection
- Feedback-enabled Microwave Quantum Illumination
- Noiseless linear amplification in quantum target detection using Gaussian states
- Quantum Illumination with a Parametrically Amplified Idler
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