scholarly journals Fibre polarization state compensation in entanglement-based quantum key distribution

2021 ◽  
Author(s):  
yicheng shi ◽  
Hou Shun Poh ◽  
Alexander Ling ◽  
Christian Kurtsiefer
Keyword(s):  
Quantum Key Distribution ◽  
Polarization State ◽  
Key Distribution ◽  
State Compensation

scholarly journals Polarization-Basis Tracking Scheme in Satellite Quantum Key Distribution

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Morio Toyoshima ◽  
Hideki Takenaka ◽  
Yozo Shoji ◽  
Yoshihisa Takayama ◽  
Masahiro Takeoka ◽  
...  
Keyword(s):  
Free Space ◽  
Quantum Key Distribution ◽  
Polarization State ◽  
Key Distribution ◽  
Optical Signal ◽  
Prototype System ◽  
Promising Technique ◽  
Ground Station ◽  
Transmission Distance ◽  
Key Techniques

Satellite quantum key distribution is a promising technique that overcomes the limited transmission distance in optical-fiber-based systems. The polarization tracking technique is one of the key techniques in the satellite quantum key distribution. With free-space quantum key distribution between an optical ground station and a satellite, the photon polarization state will be changed according to the satellite movement. To enable polarization based quantum key distribution between mobile terminals, we developed a polarization-basis tracking scheme allowing a common frame of reference to be shared. It is possible to orient two platforms along a common axis by detecting the reference optical signal only on the receiver side with no prior information about the transmitter's orientation. We developed a prototype system for free-space quantum key distribution with the polarization-basis tracking scheme. Polarization tracking performance was 0.092° by conducting quantum key distribution experiments over a 1 km free space between two buildings in a Tokyo suburb.

Analysis of polarization state in quantum key distribution via single-photon two-qubit states

Optik ◽  
2014 ◽  
Vol 125 (4) ◽  
pp. 1522-1525 ◽  
Author(s):  
Gu-hao Zhao ◽  
Shang-hong Zhao ◽  
Zhou-shi Yao ◽  
Chen-Lu Hao ◽  
Wen Meng ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Single Photon ◽  
Polarization State ◽  
Key Distribution ◽  
Qubit States

scholarly journals Регистрация однофотонного сигнала от низколетящих спутников для целей спутникового квантового распределения ключей

2021 ◽  
Vol 47 (17) ◽  
pp. 46
Author(s):  
А.В. Хмелев ◽  
А.В. Дуплинский ◽  
В.Ф. Майборода ◽  
Р.М. Бахшалиев ◽  
М.Ю. Баланов ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Polarization State ◽  
Tracking Error ◽  
Key Distribution ◽  
Optical Signal ◽  
Low Earth Orbit ◽  
Earth Orbit ◽  
Ground Station ◽  
Low Earth Orbit Satellite ◽  
Quantum Polarization

A ground-based receiving station for quantum key distribution with a satellite, capable of analyzing the quantum polarization states of photons, is demonstrated. In the experiment on tracking a low-Earth orbit satellite, the residual tracking error by the ground station does not exceed 10 μrad, which ensures stable reception of the optical signal in four channels of the polarization state decoder. An estimation of the efficiency of registration of an optical signal in the mode of tracking satellites is carried out.

Quantum Key Distribution: Attacks and Solutions

2020 ◽  
Author(s):  
Vimal Gaur ◽  
Devika Mehra ◽  
Anchit Aggarwal ◽  
Raveena Kumari ◽  
Srishti Rawat
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution
Sign in / Sign up

Export Citation Format

Share Document