Performance of Free-Space QKD Systems Using SIM/BPSK and Dual-Threshold/Direct-Detection

Trinh, Phuc V.; Pham, Thanh V.; Nguyen, Hung Viet; Ng, Soon Xin

doi:10.1109/glocomw.2016.7848999

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…To obtain the channel transmittance, we first need to model the free-space channel. Different with a general free-space MDI-QKD, our MRR-MDI-QKD suffers from the doublepass channel, where the total geometric loss in the two passes can be described as [19,20]:…”

Section: The Framework For the Key Rate Estimation Of Mrr-mdi-qkd In A Turbulent Channelmentioning

confidence: 99%

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

Wang

Liu

et al. 2021

Entropy

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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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Section: The Framework For the Key Rate Estimation Of Mrr-mdi-qkd In A Turbulent Channelmentioning

confidence: 99%

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

Wang

Liu

et al. 2021

Entropy

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“…The equation of geometrical loss as suggested in [29] has been used in standard FSO using a single beam specifically in quantum communication [30,31], respectively, and can be calculated using:…”

Section: Formulation Of Fso Multiphoton Quantum Cryptographymentioning

confidence: 99%

MQC-MB: Multiphoton Quantum Communication Using Multiple-Beam Concept in Free Space Optical Channel

et al. 2020

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Multiphoton Quantum Key Distribution (QKD) has recently been proposed to exchange the secret keys using the rotational of polarization over a multi-stage protocol. It has the ability to outperform the weaknesses of a single photon QKD by improving the generation of key rate and distance range. This paper investigates the theoretical aspects of multiphoton QKD protocol’s performance over free space optic (FSO) networks. The most common setup for quantum communication is the single-beam approach. However, the single-beam setup has limitations in terms of high geometrical loss. In this paper, the symmetry multiple-beam for quantum communication which is called as Multiphoton Quantum Communication-Multiple Beam (MQC-MB) is proposed to transmit the multiphoton from the sender to the receiver in order to minimize the impact of geometrical loss that is faced by the single-beam setup. The analysis was carried out through mathematical analysis by establishing the FSO quantum model with the effects of atmospheric and geometrical loss as well as considering atmospheric turbulence modeled by log-normal distribution. The design criteria of FSO, such as the transmitter, receiver, beam divergence, and diameter of apertures, are analytically investigated. The numerical results demonstrate that the MQC-MB outperforms the single-beam in terms of reducing channel loss by about 8 dB and works well under strong turbulence channel. Furthermore, the MQC-MB reduces the quantum bit error rate (QBER) and improves the secret key rate (SKR) as compared to the single-beam system even though the distance between the sender and receiver increases.

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“…Since only the two-way system is used at the encoding side, the encoding process can automatically compensate for the birefringence, polarization-related loss, and phase shift in the fiber [5,40,41] . QKD in free space requires a set of devices that can transmit and track scan probes [42,43] . Our scheme can increase the number of Alice users by sharing only one transmitter at low cost; combined with time division multiplexing (TDM) [35] , we can realize QKD between all users in one region and Bob in another region.…”

Section: Introductionmentioning

confidence: 99%

Phase modulation polarization encoding module applied to one-to-many QKD network based on wavelength division multiplexing

Zhang

Qin²,

Wang

et al. 2022

中国光学快报

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The quantum key distribution (QKD) network is a promising solution for secure communications. In this paper, we proposed a polarization-independent phase-modulated polarization encoding module, and it can be combined with a dense wavelength division multiplexer (DWDM) to achieve multi-user QKD. We experimentally test the encoding module with a repetition rate of 62.5 MHz, and its average quantum bit error rate (QBER) is as low as 0.4%. Finally, we implement a principle verification test for simultaneous QKD for 1 to 2 users in 100 min, and the average QBER of two users under the transmission distance of 1 km and 5 km is kept below 0.8%. Due to the use of polarization encoding, the module can also realize scalable network architecture in free-space QKD systems in the future.

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Performance of Free-Space QKD Systems Using SIM/BPSK and Dual-Threshold/Direct-Detection

Cited by 8 publications

References 19 publications

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

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

MQC-MB: Multiphoton Quantum Communication Using Multiple-Beam Concept in Free Space Optical Channel

Phase modulation polarization encoding module applied to one-to-many QKD network based on wavelength division multiplexing

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