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A new high definition radar system that could 
change the nature of warfare has been demonstrated for the first time. 
The result, quantum radar, is a high definition detection system that 
provides a much more detailed image of targets while itself remaining 
difficult to detect. Quantum radars could provide users with enough 
detail to identify aircraft, missiles, and other aerial targets by 
specific model. </div>
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According to the <em>MIT Technology Review</em>, researchers at Austria’s Institute of Science and Technology used entangled microwaves to <a class="body-link" data-vars-ga-outbound-link="https://www.technologyreview.com/s/614160/quantum-radar-has-been-demonstrated-for-the-first-time/" href="https://www.technologyreview.com/s/614160/quantum-radar-has-been-demonstrated-for-the-first-time/"><u>create the world’s first quantum radar system</u></a>. </div>
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Under a principle known as quantum entanglement, 
two particles can be linked together regardless of distance, forming 
what scientists call a quantum entangled pair. When something happens to
 one particle it can be noticed in the other particle. This in turn 
leads to a process called quantum illumination, where information about 
one particle’s environment can be inferred by studying the other 
particle.</div>
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Quantum radars involve pairing photon 
particles together, shooting one downrange while keeping the second 
captive for observation. The downrange particle will act in a certain 
manner as it bounces off certain objects, behavior that can be observed 
in the captive particle. The result is much more detailed information 
about the target than seen in previous radars.  </div>
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Today’s
 radars can detect targets very well, but provide little detail. Radars 
can detect an object and note it's altitude, bearing, and distance, but 
otherwise the target is a big, featureless blob. Air defenders must rely
 on other things, such identifying radar and other electromagnetic 
signals emanating from the target, to discern whether the blob is an 
enemy fighter, bomber, or even a commercial civilian aircraft. </div>
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Quantum
 radars, on the other hand, could provide enough detail for radar 
systems to identify the object based on physical characteristics. A 
Su-35 Flanker-E fighter, for example, could be identified by the sweep 
of its wings, the shape of its nose, and the number of engines. </div>
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Another benefit of quantum radars: they emit very 
little energy and are thus difficult to detect. All contemporary radars 
emit electromagnetic radiation to detect objects. This radiation makes 
the radar itself detectable. It’s a lot like having lots of people 
holding flashlights in a dark room: turning on your flashlight allows 
you to find other people but the flashlight beam leads straight back to 
you, giving away your presence and location. </div>
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A 
lack of detectability offers a distinct tactical advantage in warfare. A
 friendly quantum radar could detect a flight of enemy aircraft without 
revealing its own presence. This could cause the enemy warplanes to put 
off defensively jamming local radars and radio signals—which itself is 
noticeable to the defenders. Their guard down, they could then be 
ambushed by friendly air defense missiles and fighters waiting for them.
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Quantum radars has been billed as a means for detecting stealth aircraft, with <a class="body-link" data-vars-ga-outbound-link="https://phys.org/news/2018-04-quantum-radar-expose-stealth-aircraft.html" href="https://phys.org/news/2018-04-quantum-radar-expose-stealth-aircraft.html"><u>claims</u></a> that it renders efforts to make aircraft invisible to radar useless. According to three experts polled by<a class="body-link" data-vars-ga-outbound-link="https://eandt.theiet.org/content/articles/2019/04/could-quantum-radars-expose-stealth-planes/" href="https://eandt.theiet.org/content/articles/2019/04/could-quantum-radars-expose-stealth-planes/"> <em><u>Engineering and Technology</u></em></a>, anti-stealth claims are a “gross oversimplication” and the main advantage of quantum radar is the high definition aspect. </div>
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Source: <em><a class="body-link" data-vars-ga-outbound-link="https://www.technologyreview.com/s/614160/quantum-radar-has-been-demonstrated-for-the-first-time/" href="https://www.technologyreview.com/s/614160/quantum-radar-has-been-demonstrated-for-the-first-time/" target="_blank">MIT Technology Review</a></em></div>
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												<a class="editorial-link-item" data-vars-ga-call-to-action="China Says It Made a 'Quantum Radar'" data-vars-ga-outbound-link="https://www.popularmechanics.com/military/research/a22996/china-quantum-stealth-radar/" data-vars-ga-position="1" data-vars-ga-total-positions="1" data-vars-ga-ux-element="Editorial Links" href="https://www.popularmechanics.com/military/research/a22996/china-quantum-stealth-radar/">
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China Says It Made a 'Quantum Radar'</div>
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Quantum Radar Could Completely Change Warfare

A new high definition radar system that could change the nature of warfare has been demonstrated for the first time. The result, quantum radar, is a high definition detection system that provides …

Errymath

Quantum Radar Could Completely Change Warfare

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