Quantum radar

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Quantum radar is a hypothetical remote-sensing method based on quantum entanglement.

One possible implementation of such technology has been developed and patented[1] by defense contractor Lockheed Martin.[2] It intends to create a radar system which provides a better resolution and higher detail than classical radar can provide.

The technology is hoped to work by using photon entanglement to allow several entangled photons to function as if a shorter wavelength was used to allow detection of small details while having an overall longer group wavelength that allows long distance transmission.[3]

According to a recent and controversial (but not yet known to have been disproven) theory, any such remote-sensing device (including, but not limited to Lockheed Martin's planned implementation of technology), using quantum (photon) entanglement, may be able to extract meaningful information from specific regions of hyperspace.

A hypothetical research paper on the subject suggests that photon-entanglement, combined with interferometry, can possibly be used to remote-sense distant quantum properties of past, present or even future hypersurfaces of spacetime. The paper is based on exploiting causal and relativistic loopholes[4] supposedly found in the 1999 realization of the Delayed Choice Quantum Eraser experiment by Yoon-Ho Kim, R. Yu, S.P. Kulik, Y.H. Shih, designed by Marlan O. Scully.

One advantage of a quantum radar system is that it automatically detects deceptive jamming, which might otherwise go unnoticed.[5]


  1. ^ "European patent number EP1750145". Retrieved 2007-03-17. 
  2. ^ Adam, David (2007-03-06). "US defence contractor looks for quantum leap in radar research". The Guardian (London). Retrieved 2007-03-17. 
  3. ^ Marco Lanzagorta, Quantum Radar, Morgan & Claypool (2011).
  4. ^ "Causal and relativistic loopholes in a Delayed-choice Quantum Eraser Experiment". Retrieved 2011-01-04. 
  5. ^ "Quantum Imaging Technique Heralds Unjammable Aircraft Detection."

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