scholarly journals Experimental demonstration of adaptive VFF-RLS-FDE for long-distance mode-division multiplexed transmission

2018 ◽  
Vol 26 (14) ◽  
pp. 18362 ◽  
Author(s):  
Zhiqun Yang ◽  
Jian Zhao ◽  
Neng Bai ◽  
Ezra Ip ◽  
Ting Wang ◽  
...  
Keyword(s):  
Experimental Demonstration ◽  
Long Distance

scholarly journals Experimental demonstration of long-distance continuous-variable quantum key distribution

2013 ◽  
Vol 7 (5) ◽  
pp. 378-381 ◽  
Author(s):  
Paul Jouguet ◽  
Sébastien Kunz-Jacques ◽  
Anthony Leverrier ◽  
Philippe Grangier ◽  
Eleni Diamanti
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Experimental Demonstration ◽  
Long Distance

Experimental demonstration of using wet-mate connector in offshore long-distance Raman amplified optical links

2020 ◽  
Author(s):  
Steinar Bjørnstad ◽  
Rolf Bøe ◽  
W.R.L. Clements ◽  
Bernard Shum-tim ◽  
Kris Sanapi ◽  
...  
Keyword(s):  
Experimental Demonstration ◽  
Long Distance ◽  
Optical Links

scholarly journals Carry-over effects from breeding modulate the annual cycle of a long-distance migrant: an experimental demonstration

Ecology ◽  
2013 ◽  
Vol 94 (6) ◽  
pp. 1230-1235 ◽  
Author(s):  
Paulo Catry ◽  
Maria P. Dias ◽  
Richard A. Phillips ◽  
José P. Granadeiro
Keyword(s):  
Annual Cycle ◽  
Experimental Demonstration ◽  
Long Distance ◽  
Carry Over

scholarly journals Proof-of-principle experimental demonstration of twin-field quantum key distribution over optical channels with asymmetric losses

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Xiaoqing Zhong ◽  
Wenyuan Wang ◽  
Li Qian ◽  
Hoi-Kwong Lo
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Experimental Demonstration ◽  
Asymmetric Channel ◽  
Long Distance ◽  
Optical Channels ◽  
Fundamental Limit ◽  
Point To Point ◽  
Signal Intensities ◽  
Proof Of Principle

AbstractTwin-field (TF) quantum key distribution (QKD) is highly attractive because it can beat the fundamental limit of secret key rate for point-to-point QKD without quantum repeaters. Many theoretical and experimental studies have shown the superiority of TFQKD in long-distance communication. All previous experimental implementations of TFQKD have been done over optical channels with symmetric losses. But in reality, especially in a network setting, the distances between users and the middle node could be very different. In this paper, we perform a proof-of-principle experimental demonstration of TFQKD over optical channels with asymmetric losses. We compare two compensation strategies, that are (1) applying asymmetric signal intensities and (2) adding extra losses, and verify that strategy (1) provides much better key rate. Moreover, the higher the loss, the more key rate enhancement it can achieve. By applying asymmetric signal intensities, TFQKD with asymmetric channel losses not only surpasses the fundamental limit of key rate of point-to-point QKD for 50 dB overall loss, but also has key rate as high as 2.918 × 10−6 for 56 dB overall loss. Whereas no keys are obtained with strategy (2) for 56 dB loss. The increased key rate and enlarged distance coverage of TFQKD with asymmetric channel losses guarantee its superiority in long-distance quantum networks.

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