At present,the quantum information theory is developing vigorously,and its application has penetrated in every domain of natural sciences.The quantum radar is one kind of application of quantum technology to detect objects.The quantum radar is able to detect the stealth objects and has super strong concealment and flexibility.The classification,the principle,the composition,the feature and the key technology of the quantum radar are mainly introduced.
At present,the quantum information theory is developing vigorously,and its application has penetrated in every domain of natural sciences.The quantum radar is one kind of application of quantum technology to detect objects.The quantum radar is able to detect the stealth objects and has super strong concealment and flexibility.The classification,the principle,the composition,the feature and the key technology of the quantum radar are mainly introduced.
Quantum metrology exploits quantum phenomena to improve the measurement sensitivity. Theoretical analysis shows that quantum measurement can break through the standard quantum limits and reach super sensitivity level. Quantum radar systems based on quantum measurement can fufill not only conventional target detection and recognition tasks but also capable of detecting and identifying the RF stealth platform and weapons systems. The theoretical basis, classification, physical realization of quantum radar is discussed comprehensively in this paper. And the technology state and open questions of quantum radars is reviewed at the end.
The quantum computing began with the concern of Richard Feynman to simulate the non-classical physical theories, Shor's algorithm showed the power of the quantum mechanics when solved a classical problem with it, these facts push the technology to discover and implement the quantum illumination, this discovery made a huge change in sensing theory, moreover, the implemented such as phenomena with a classical radar, make a play role in detecting strategies in sensing the stealth objects (whatever be an aircraft or drones), even more, the quantum radar can detect in an efficient way and more accuracy the natural debris outside the atmosphere, also, the quantum radar can work even though, in nosy, foggy, and high-temperature environment, all these features make the quantum radar promising emerging technology deserve to develop and enhanced in theoretical and technical ways. this paper provided a short analysis study to the most common types of quantum radar showing their cons and pros and could be used either in civil or military fields.
Stealth planes currently go under the radar, figuratively speaking, but maybe the higher definition promised by quantum radars could be used to expose them. Radar technology has become an ever more important tool in warfare since the Second World War, used to monitor the electromagnetic spectrum to detect and track enemy aircraft, missiles, satellites and other systems that in turn have grown more sophisticated in evading detection. Building better, more sensitive and harder-to-detect radar systems remains a key focus for defence manufacturers today, especially since in October 2018 the US Navy designated the electromagnetic spectrum as a warfighting domain on par with sea, land, air, space and cyber. Last year, China's biggest defence electronics company, state-owned China Electronics Technology Group, announced it had developed a next-generation quantum radar system' that, it claimed, can detect ballistic missiles and other objects flying at high speed through space. Two years previously, the group said it had tested a quantum radar to a range of 100km (60 miles). The expectation is that quantum radar, due to the unique behaviour of quantum entanglement, could, among other things, 'un-stealth' aircraft by detecting objects with a greater level of accuracy than conventional radar. Therefore, if China's announcement is true - and it hasn't provided any evidence to back its claim - it would be a huge win for both its defence and quantum capabilities.
This paper provides a brief introduction of the current state of quantum radar (QR) technology development, focusing on the experimental methods used for modifying QR in a laboratory setting. We delve into the foundational principles of quantum electrodynamics and consider interferometric aspects. Quantum radar systems, empowered by quantum measurements, extend their capabilities beyond conventional target detection and recognition, encompassing the detection and identification of RF stealth platforms and advanced weapons systems. Quantum technology is gaining paramount significance in various research domains, with the emergence of the concept of quantum radar, which leverages the quantum states of photons to extract information from distant targets. The mechanism involves dispatching photons, or photon clusters, toward the target, whereupon they are absorbed and subsequently re-emitted. The crucial measurement process can be executed in two distinct manners. One approach entails an interferometric measurement, often referred to as phase measurement, conducted on the photons, while the alternative method involves the straightforward quantification of returning photons. These methods are respectively known as Interferometric QR and Quantum Illumination (QI). In both approaches, one can opt to employ stationary quantum states of photons or harness entangled states. Extensive research has demonstrated that the use of entangled states yields the most significant resolution enhancement, achieving optimal results under ideal conditions. Quantum states offer a substantial advantage by virtue of their inherent correlations, referred to as quantum correlations, which augment both resolution and signal-to-noise ratio (SNR) in the radar system. This paper explores the intricacies of these advancements in quantum radar technology, shedding light on the underlying principles and experimental methodologies.
This paper provides a detailed exploration of quantum radar technology, focusing on the generation, measurement, and theoretical analysis of quantum-correlated signals in both optical and microwave domains. We examine the mechanisms behind producing entangled signals and their application to improve radar sensitivity and accuracy in noisy environments. A review of key studies is presented, with emphasis on their experimental setups and the limitations that define the potential of quantum radar. By aggregating data on object detection range and analyzing global research trends through visualizations, including a bar chart and a world map, we illustrate the growing interest and research efforts in this domain. Our findings highlight the significant advancements and remaining challenges in developing practical quantum radar systems, as well as the worldwide collaboration driving progress in this cutting-edge field.
This paper presents a study on quantum radar technology developments, design Consideration for its integration, and quantum radar cross-section, QRCS based on quantum electrodynamics and interferometric considerations. Quantum radar systems supported by quantum measurement can fulfill not only conventional target detection and recognition tasks but are also capable of detecting and identifying the RF stealth platform and weapons systems. The development of radar technology is of the utmost importance in many avenues of research. The concept of a quantum radar has been proposed which utilizes quantum states of photons to establish information on a target at a distance. A photon, or a little cluster of photons, is distributed towards the target. The photons are absorbed and reemitted from the target and into the receiver. The measurement process may be executed in two alternative ways. One can perform an interferometric measurement (or phase measurement) on the photon, or one can simply count the number of photons that return. the previous method is named Interferometric Quantum Radar, and therefore the latter method is termed Quantum Illumination. For either of those methods, one can use stationary quantum states of photons or use entangled states. Its been shown that entangled states provide the most effective possible boost in resolution, achieving within the ideal case. The benefit of using quantum states is that they exhibit extra degrees of correlation by which to get information compared to classical methods. These extra correlations (called quantum correlations) serve to boost the resolution and signal/noise (SNR) that may be achieved within the radar system.