Correlation properties of single photon binary waveforms used in quantum radar/lidar

Matthew J. Brandsema; Ram M. Narayanan; Marco Lanzagorta

doi:10.1117/12.2560184

23 April 2020 Correlation properties of single photon binary waveforms used in quantum radar/lidar

Matthew J. Brandsema, Ram M. Narayanan, Marco Lanzagorta

Proceedings Volume 11408, Radar Sensor Technology XXIV; 114080Q (2020) https://doi.org/10.1117/12.2560184
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

Recently, much of the quantum radar/lidar research is focused on correlating single photon detection events with no delay line on the idler path. In other words, measuring the idler immediately, and correlating these events with later received photon events from the returning signal. This research approach has raised some questions due to the fact that all measurements done are classical, yet researchers are still observing sensor improvement in comparison to classical techniques. This therefore implies that the benefits from quantum radar/lidar using these techniques should be able to be explained entirely classically. This paper explores this concept by asserting that the correlation between the signals used in quantum remote sensing is largely due to the fact that the signal and idler photons are created simultaneously (which is only possible from an entangled source). We show, using very simple computer simulations, that having a single photon correlated (binary) waveform leads to correlation SNR advantages only in the low photon level regime, agreeing with previous literature.

Conference Presentation

Citation Download Citation

Matthew J. Brandsema, Ram M. Narayanan, and Marco Lanzagorta "Correlation properties of single photon binary waveforms used in quantum radar/lidar", Proc. SPIE 11408, Radar Sensor Technology XXIV, 114080Q (23 April 2020); https://doi.org/10.1117/12.2560184

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