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Free-space quantum communications system and process operative absent line-of-sight

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CCDC ARL

Photonic signals are tagged with a pre-selected modification, such as a polarization signature to carry data across an obstructed path between sender and receiver. Communication authentication through polarization variation allows for Yuen-Kumar or entangled photon quantum communication protocols to propagate through environmental scattering media such as air, smoke, fog, rain, and water. While ultraviolet light photons are well suited as a carrier for quantum communication signals scattered in air, it is appreciated that visible wavelengths have longer propagation paths in water to convey non-line-of-sight data. A secure signal is scattered by the media and simultaneously communicated to a single recipient or multiple recipients exposed to scattered signal portions. A process of solving the scattering processes through a random scattering media is provided to reconstruct a quantum keyed message at a receiver. The scattering of the signal is utilized herein to provide non-line-of-sight and intentional short-range communication.

Inventors: 
Meyers, Ronald Everett; Deacon, Keith Scott
Patent Number: 
Technical domain: 
Communications
FIle Date: 
2010-08-20
Grant Date: 
2011-05-17
Grant time: 
270 days
Grant time percentile rank: 
4
Claim count percentile rank: 
5
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US ARMY