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Volumn 94, Issue 15, 2005, Pages

Experimental free-space distribution of entangled photon pairs over 13 km: Towards satellite-based global quantum communication

Author keywords

[No Author keywords available]

Indexed keywords

AEROSPHERE; ENTANGLED PHOTON PAIRS; NOISY GROUND ATMOSPHERE; SATELLITE BASED GLOBAL QUANTUM COMMUNICATIONS;

EID: 18144389856     PISSN: 00319007     EISSN: 10797114     Source Type: Journal    
DOI: 10.1103/PhysRevLett.94.150501     Document Type: Article
Times cited : (310)

References (25)
  • 17
    • 18144410094 scopus 로고    scopus 로고
    • note
    • Since in realistic free-space quantum communication the two users, Alice and Bob, will usually be located on the Earth, we have to demonstrate that the entanglement can still survive after both entangled photons have passed through a noisy ground atmosphere with a distance beyond the equivalent of the aerosphere. In our experiment, 702 nm light is used for entanglement distribution. The transmission of 702 nm light from the whole vertical atmosphere is about 70% under good weather conditions. The horizontal attenuation coefficient measured in Hefei was approximately α = 0.19/km. The horizontal distance with the same attenuation as the whole atmosphere vertically is L = - ln(0.7)/α = 1.9 km. Further calculation shows that even under bad weather conditions, say, with a low visibility of 5 km, the distances that we have achieved are still well beyond the atmospheric equivalent.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.