Phys.org January 10, 2022
Despite the many proposals for quantum radar, none have delineated the ultimate quantum limit on ranging accuracy. A team of researchers in the US (University of Arizona, MIT) has derived that limit through continuous-time quantum analysis. They showed that quantum illumination ranging—a quantum pulse-compression radar that exploits the entanglement between a high time-bandwidth product transmitted signal pulse and a high time-bandwidth product retained idler pulse—achieves that limit. They also showed that quantum illumination ranging offers mean-squared range-delay accuracy that can be tens of dB better than that of a classical pulse-compression radar of the same pulse bandwidth and transmitted energy…read more. Open Access TECHNICAL ARTICLEÂ
Contour plot of mean-squared range-delay accuracy advantage (in dB) at SNRQthresh… Credit: Phys. Rev. Lett. 128, 010501, 5 January 2022Â