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Progress Toward an All-Microwave Quantum Illumination Radar
IEEE Aerospace and Electronic Systems Magazine ( IF 3.6 ) Pub Date : 2020-11-01 , DOI: 10.1109/maes.2020.3024422
Jerome Bourassa , Christopher M. Wilson

Quantum illumination has been suggested as a way to improve the sensitivity of remote target detection by taking advantage of quantum entanglement between a traveling electromagnetic beam of light interrogating the target, and a second beam kept in the lab. In the microwave domain, superconducting quantum circuit utilizing superconducting Josephson tunnel junctions can be used as quantum-limited amplifiers of faint microwave signals, as well as bright sources of quantum entangled signals. These Josephson parametric amplifiers (JPAs) are poised to become fundamental building block in a future quantum illumination radar operating in the microwave domain. Demonstrating a practical advantage of quantum illumination with ambient temperature signals is, however, challenging. Indeed, current quantum protocols are not practical as they require a complex receiver with stringent phase-matching conditions, which cannot be met in the field. Notably, it is also not currently known how one can transfer faint microwave signals out of cryogenic systems without destroying their fragile entanglement. In this article, we discuss the recent progress and challenges regarding the development of an all-microwave quantum illumination radar using the recently developed and implemented quantum-enhanced noise radar protocol. This quantum illumination protocol is simpler to implement and procures a quantum enhancement over its classical analog. Finally, we discuss different strategies that may resolve the issue of transmitting microwave entanglement under ambient conditions. We, thus, conclude that successful transmission of entangled microwaves can be done in the near future, with possible demonstrations of practical quantum advantage over short distances.

中文翻译:

全微波量子照明雷达的进展

量子照明已被建议作为一种通过利用询问目标的行进电磁光束与保持在实验室中的第二光束之间的量子纠缠来提高远程目标检测灵敏度的方法。在微波领域,利用超导约瑟夫森隧道结的超导量子电路可用作微弱微波信号的量子限幅放大器,以及量子纠缠信号的亮源。这些约瑟夫森参量放大器 (JPA) 有望成为未来在微波领域工作的量子照明雷达的基本构建模块。然而,用环境温度信号展示量子照明的实际优势是具有挑战性的。确实,当前的量子协议并不实用,因为它们需要具有严格相位匹配条件的复杂接收器,而这在现场是无法满足的。值得注意的是,目前还不知道如何将微弱的微波信号从低温系统中传输出来,而不破坏它们脆弱的纠缠。在本文中,我们讨论了使用最近开发和实施的量子增强噪声雷达协议开发全微波量子照明雷达的最新进展和挑战。这种量子照明协议实施起来更简单,并且在其经典模拟上获得了量子增强。最后,我们讨论了可能解决在环境条件下传输微波纠缠问题的不同策略。我们,因此,
更新日期:2020-11-01
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