scholarly journals Autocompensating measurement-device-independent quantum cryptography in space division multiplexing optical fibers

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
J. Liñares ◽  
G. M. Carral ◽  
X. Prieto-Blanco ◽  
D. Balado
Keyword(s):  
Optical Fibers ◽  
Free Space ◽  
Quantum Key Distribution ◽  
Single Photon ◽  
Random Perturbations ◽  
Measurement Device ◽  
Space Division Multiplexing ◽  
Space Division ◽  
Measurement Devices ◽  
Measurement Device Independent

AbstractSingle photon or biphoton states propagating in optical fibers or in free space are affected by random perturbations and imperfections that disturb the information encoded in such states and accordingly quantum key distribution is prevented. We propose three different systems for autocompensating such random perturbations and imperfections when a measurement-device-independent protocol is used. These systems correspond to different optical fibers intended for space division multiplexing and supporting collinear modes, polarization modes or codirectional modes such as few-mode optical fibers and multicore optical fibers. Accordingly, we propose different Bell-states measurement devices located at Charlie system and present simulations that confirm the importance of autocompensation. Moreover, these types of optical fibers allow the use of several transmission channels, which compensates the reduction of the bit rate due to losses.

scholarly journals Autocompensating Measurement-Device-Independent Quantum Cryptography in Space Division Multiplexing Optical Fibers

2021 ◽  
Author(s):  
Jesús Liñares ◽  
Gabriel M. Carral ◽  
Xesús Prieto-Blanco ◽  
Daniel Balado
Keyword(s):  
Optical Fibers ◽  
Free Space ◽  
Quantum Key Distribution ◽  
Single Photon ◽  
Random Perturbations ◽  
Measurement Device ◽  
Space Division Multiplexing ◽  
Space Division ◽  
Measurement Devices ◽  
Measurement Device Independent

Abstract Single photon or biphoton states propagating in optical bers or in free space are affected by random perturbations or imperfections along optical bers or free space that disturb the information encoded in such states and accordingly quantum key distribution is prevented. We propose three different systems for autocompensating such random perturbations and imperfections when a measurement-device-independent protocol is used. These systems correspond to different optical bers intended for space division multiplexing and supporting collinear modes, polarization modes or codirectional modes such as few-mode optical bers and multicore optical bers. Accordingly, we propose different Bell-states measurement devices. Finally, these types of optical bers allow the use of several transmission channels what compensates the reduction of the bit rate due to losses.

scholarly journals Long-Distance Free-Space Measurement-Device-Independent Quantum Key Distribution

2020 ◽  
Vol 125 (26) ◽  
Author(s):  
Yuan Cao ◽  
Yu-Huai Li ◽  
Kui-Xing Yang ◽  
Yang-Fan Jiang ◽  
Shuang-Lin Li ◽  
...  
Keyword(s):  
Free Space ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Long Distance ◽  
Measurement Device ◽  
Space Measurement ◽  
Measurement Device Independent

scholarly journals Improving Underwater Continuous-Variable Measurement-Device-Independent Quantum Key Distribution via Zero-Photon Catalysis

Entropy ◽  
2020 ◽  
Vol 22 (5) ◽  
pp. 571
Author(s):  
Yuang Wang ◽  
Shanhua Zou ◽  
Yun Mao ◽  
Ying Guo
Keyword(s):  
Quantum Key Distribution ◽  
Single Photon ◽  
Elevation Angle ◽  
Key Distribution ◽  
Continuous Variable ◽  
Secret Key ◽  
Underwater Communications ◽  
Measurement Device ◽  
Transmission Distance ◽  
Measurement Device Independent

Underwater quantumkey distribution (QKD) is tough but important formodern underwater communications in an insecure environment. It can guarantee secure underwater communication between submarines and enhance safety for critical network nodes. To enhance the performance of continuous-variable quantumkey distribution (CVQKD) underwater in terms ofmaximal transmission distance and secret key rate as well, we adopt measurement-device-independent (MDI) quantum key distribution with the zero-photon catalysis (ZPC) performed at the emitter of one side, which is the ZPC-based MDI-CVQKD. Numerical simulation shows that the ZPC-involved scheme, which is a Gaussian operation in essence, works better than the single photon subtraction (SPS)-involved scheme in the extreme asymmetric case. We find that the transmission of the ZPC-involved scheme is longer than that of the SPS-involved scheme. In addition, we consider the effects of temperature, salinity and solar elevation angle on the system performance in pure seawater. The maximal transmission distance decreases with the increase of temperature and the decrease of sunlight elevation angle, while it changes little over a broad range of salinity

scholarly journals Free Space Measurement Device Independent Quantum Key Distribution with Modulating Retro-Reflectors under Correlated Turbulent Channel

Entropy ◽  
2021 ◽  
Vol 23 (10) ◽  
pp. 1299
Author(s):  
Xingyu Wang ◽  
Wei Liu ◽  
Tianyi Wu ◽  
Chang Guo ◽  
Yijun Zhang ◽  
...  
Keyword(s):  
Free Space ◽  
Quantum Key Distribution ◽  
Channel Model ◽  
Key Distribution ◽  
Superior Performance ◽  
Double Pass ◽  
Plug And Play ◽  
Measurement Device ◽  
Moving Platforms ◽  
Measurement Device Independent

Modulating retro-reflector (MRR), originally introduced to support laser communication, relieves most of the weight, power, and pointing requirements to the ground station. In this paper, a plug-and-play measurement device independent quantum key distribution (MDI-QKD) scheme with MRR is proposed not only to eliminate detector side channels and allow an untrusted satellite relay between two users, but also to simplify the requirements set-ups in practical flexible moving scenarios. The plug-and-play architecture compensates for the polarization drift during the transmission to provide superior performance in implementing the MDI-QKD on a free-space channel, and the MRR device is adopted to relax the requirements on both communication terminals. A double-pass correlated turbulent channel model is presented to investigate the complex and unstable channel characteristics caused by the atmospheric turbulence. Furthermore, the security of the modified MDI-QKD scheme is analyzed under some classical attacks and the simulation results indicate the feasibility under the situation that the system performance deteriorates with the increase of fading correlation coefficient and the turbulence intensity, which provides a meaningful step towards an MDI-QKD based on the moving platforms to join a dynamic quantum network with untrusted relays.

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