Article
Multidisciplinary Sciences
Manal Khawasik, Wagdy Gomaa El-Sayed, M. Z. Rashad, Ahmed Younes
Summary: Quantum Key Distribution is a secure method that enhances communication system security by implementing cryptographic protocols. This paper proposes a secure bidirectional quantum key distribution protocol, which proves its security against collective attacks through estimating the interception probability of eavesdroppers. The protocol encodes information using two-qubit states and employs partial diffusion operator for encryption, while maintaining secrecy and qubit efficiency.
Article
Optics
Vinod N. Rao, R. Srikanth
Summary: Counterfactual quantum key distribution protocols can be made more efficient by including noncounterfactual bits, potentially leading to noiseless attacks. Counterfactual security can enhance key rate without compromising security in various existing protocols.
Article
Optics
Fadri Grunenfelder, Alberto Boaron, Giovanni V. Resta, Matthieu Perrenoud, Davide Rusca, Claudio Barreiro, Raphael Houlmann, Rebecka Sax, Lorenzo Stasi, Sylvain El-Khoury, Esther Hanggi, Nico Bosshard, Felix Bussieres, Hugo Zbinden
Summary: Quantum key distribution is the most viable scheme for information security in the presence of large-scale quantum computers and is now commercially available. However, the limited key rates have been a challenge due to bottlenecks on the receiver side. In this study, a custom multipixel superconducting nanowire single-photon detector is presented to address these challenges and achieve a significant increase in key rates.
Article
Physics, Multidisciplinary
Yun Mao, Yin Li, Ying Guo
Summary: This paper investigates the practical security of continuous-variable quantum key distribution system under the influence of saturation attack on imperfect detectors. It suggests a method to resist this attack by embedding an adjustable optical filter in the detector. Numerical simulations demonstrate the practical security of the system and indicate the effectiveness of this approach in practical quantum networks.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Quantum Science & Technology
Alvaro Navarrete, Marcos Curty
Summary: Most security proofs of quantum key distribution (QKD) fail to consider the information leakage from users' devices, leaving them vulnerable to Trojan-horse attacks (THAs). This study introduces finite-key security bounds for decoy-state-based QKD schemes in the presence of THAs, outperforming previous analyses. The results represent a significant step towards bridging the gap between theory and practice in QKD.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Computer Science, Information Systems
Jun Gu, Tzonelih Hwang
Summary: This paper introduces a single-state semi-quantum key distribution protocol and identifies a security vulnerability. It proposes a modification to address the issue of eavesdroppers using a double C-NOT attack to obtain the key.
Article
Quantum Science & Technology
Shuang Dong, Shang Mi, Qingcheng Hou, Yutao Huang, Jindong Wang, Yafei Yu, Zhengjun Wei, Zhiming Zhang, Junbin Fang
Summary: Semi-quantum key distribution refers to a system where a fully quantum user and a classical user perform key distribution. Its main advantage is security. However, due to technological limitations, highly attenuated lasers and threshold detectors are needed, making it susceptible to eavesdropping. In this study, we propose a semi-quantum key distribution channel model and evaluate its safety using Gottesman-Lo-Lutkenhaus-Preskill theory. We also demonstrate the vulnerability of the system to photon-number-splitting attacks and propose the use of decoy states for increased security.
EPJ QUANTUM TECHNOLOGY
(2023)
Article
Mathematics
Hung-Wen Wang, Chia-Wei Tsai, Jason Lin, Yu-Yun Huang, Chun-Wei Yang
Summary: This study proposes an efficient and secure ASQKD protocol based on single photons, which can effectively avoid reflecting attacks, collective attacks, and other typical attacks. It has advantages such as requiring less advanced quantum devices, higher communication efficiency, and no need for a classical channel.
Article
Computer Science, Hardware & Architecture
Md Shahbaz Akhtar, G. Krishnakumar, B. Vishnu, Abhishek Sinha
Summary: In this paper, we investigate the problem of fast and secure packet routing in multi-hop Quantum Key Distribution (QKD) networks. We propose a new secure throughput-optimal policy called Tandem Queue Decomposition (TQD), which incorporates the QKD process into the Universal Max Weight (UMW) routing policy. We show the practical efficiency of the TQD policy over existing routing algorithms through numerical comparisons on a realistic simulator.
IEEE-ACM TRANSACTIONS ON NETWORKING
(2023)
Article
Physics, Multidisciplinary
Geng Chen, Yuqi Wang, Liya Jian, Yi Zhou, Shiming Liu
Summary: This paper proposes a ternary quantum key distribution protocol using three-dimensional Hadamard gate, which can directly send and receive ternary quantum with potential extendibility and security advantages in the research of high-dimensional key distribution protocols.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2022)
Article
Telecommunications
Vivek Chaudhary, Harshan Jagadeesh
Summary: This paper addresses a denial of service attack on low-latency communication and proposes two cooperative relaying schemes to mitigate such attacks, namely semi-coherent fast-forward half-duplex and semi-coherent fast-forward full-duplex relaying schemes. Both schemes successfully engage the adversary on the jammed frequency band by involving helper nodes and power splitting.
IEEE TRANSACTIONS ON COGNITIVE COMMUNICATIONS AND NETWORKING
(2021)
Article
Computer Science, Information Systems
Dongjun Park, GyuSang Kim, Donghoe Heo, Suhri Kim, HeeSeok Kim, Seokhie Hong
Summary: This paper explores a side-channel attack on the key reconciliation in the quantum key distribution system, demonstrating that sensitive information can be fully recovered through power consumption trace, and proposes efficient countermeasures to mitigate such attacks.
Article
Quantum Science & Technology
Wen-Wu Liu, Chun-Ling Zhang, Ling Zhang
Summary: In this paper, a one-step scheme to generate a CNOT gate via transitionless quantum driving is proposed, which exhibits robustness against instability related to variation in experimental parameters and decoherence. The scheme can be extended to generate a Toffoli gate for large-scale quantum computers, and its implementation is greatly simplified by involving only a single step.
QUANTUM INFORMATION PROCESSING
(2021)
Article
Physics, Multidisciplinary
Shang Mi, Shuang Dong, Qincheng Hou, Jindong Wang, Yafei Yu, Zhengjun Wei, Zhiming Zhang
Summary: Semi-quantum key distribution is a method based on the principles of quantum mechanics that allows secure key sharing between classical and quantum users. Our research group demonstrated the feasibility of semi-quantum key distribution and identified its susceptibility to photon-number splitting attacks. While practical single-state semi-quantum key distribution can overcome such attacks, its dual-channel feature still presents a risk of observation by Eve.
FRONTIERS IN PHYSICS
(2022)
Article
Quantum Science & Technology
Lingling Lao, Alexander Korotkov, Zhang Jiang, Wojciech Mruczkiewicz, Thomas E. O'Brien, Dan E. Browne
Summary: This work presents two software methods to mitigate parasitic errors in two-qubit gates in quantum computing. The first approach utilizes the Cartan's KAK decomposition and applies single-qubit rotations to counteract parasitic gates without additional overhead. The second approach uses a numerical optimization algorithm to recompile a target unitary into the error-parasitic two-qubit gate plus single-qubit gates. The results show that different approaches have advantages in different error regimes, providing guidance for error mitigation in near-term quantum computers.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Correction
Multidisciplinary Sciences
Cecilia Clivati, Alice Meda, Simone Donadello, Salvatore Virzi, Marco Genovese, Filippo Levi, Alberto Mura, Mirko Pittaluga, Zhiliang Yuan, Andrew J. Shields, Marco Lucamarini, Ivo Pietro Degiovanni, Davide Calonico
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Cecilia Clivati, Alice Meda, Simone Donadello, Salvatore Virzi, Marco Genovese, Filippo Levi, Alberto Mura, Mirko Pittaluga, Zhiliang Yuan, Andrew J. Shields, Marco Lucamarini, Ivo Pietro Degiovanni, Davide Calonico
Summary: In this study, the authors use technologies from the optical clocks community to demonstrate a setup for twin-field quantum key distribution (QKD) that extends the coherence times by three orders of magnitude, overcoming the main challenge towards real-world implementation. They develop a solution using interferometry techniques to enable simultaneous key streaming and channel length control, and successfully demonstrate it on a 206 km field-deployed fiber. This technique represents an effective solution for real-world quantum communications.
NATURE COMMUNICATIONS
(2022)
Article
Ecology
Yi-Zhen Shao, Zhi-Liang Yuan, Yan-Yan Liu, Feng-Qin Liu, Rui-Chen Xiang, Yuan-Yuan Zhang, Yong-Zhong Ye, Yun Chen, Qian Wen
Summary: Understanding how species respond to climate change is crucial for conservation and management. This study examined high and low elevation firs in North America and East Asia to test two hypotheses on expansion during different climatic periods. The findings suggest that high-elevation firs experienced glacial expansion, while low-elevation firs expanded during interglacial periods. Conservation strategies, such as ex-situ conservation, are needed to protect endangered fir species in the face of increasing global warming.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Ecology
Qiang Fu, Yizhen Shao, Senlin Wang, Fengqin Liu, Guohang Tian, Yun Chen, Zhiliang Yuan, Yongzhong Ye
Summary: This study investigated the influence of different vegetation types on soil microbes in a temperate urban forest in China using high-throughput sequencing techniques. The results showed that different vegetation types have varying impacts on the abundance and spatial distribution of soil microbes, highlighting the importance of vegetation types for microbial biodiversity conservation in urban forests.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Forestry
Xiayan Zhou, Zhao Wang, Wenxin Liu, Qianjin Fu, Yizhen Shao, Fengqin Liu, Yongzhong Ye, Yun Chen, Zhiliang Yuan
Summary: The distribution of woody plants in mountain forest ecosystems is specialized and influenced by topography and monsoons. The community structure and stability vary among different aspects of the mountain.
Article
Biodiversity Conservation
Zhiliang Yuan, Man Xiao, Xiao Su, He Zhao, Yushan Li, Huiping Zhang, Ziyu Zhou, Rui Qi, Yun Chen, Wei Wang
Summary: This study investigated the plant diversity in wetlands along the middle and lower reaches of the Yellow River. A total of 184 plant species belonging to 52 families and 135 genera were found in the seven nature reserves. The results showed that both environmental factors and human disturbance factors influenced the plant diversity in these wetlands.
Article
Biodiversity Conservation
Ziyu Zhou, Man Xiao, Senlin Wang, Xueying Wang, Wang Li, Yun Chen, Zhiliang Yuan, Erhui Guo
Summary: Temporal partitioning hypothesis refers to the promotion of stable species' coexistence by reducing the likelihood of competitive exclusion. In this study, a field survey of fungal sporocarps was conducted, and the results showed highly specialized and uneven emergence of different species based on month. The findings suggest the importance of temporal partitioning in maintaining local diversity in the fungal community.
Article
Microbiology
Yun Chen, Jingjing Xi, Man Xiao, Senlin Wang, Wenju Chen, Fengqin Liu, Yizhen Shao, Zhiliang Yuan
Summary: This study shows that the distribution patterns of soil microbial communities are influenced by plant community composition, and different types of plant populations exhibit specialized distribution of soil microbes. Fungi are more specialized than bacteria.
Article
Multidisciplinary Sciences
Tao Wang, Yao Zhang, Weiyu Kong, Liang Qiao, Bingguo Peng, Zhichao Shen, Qifeng Han, Han Chen, Zhiliang Yuan, Rongkun Zheng, Xudong Yang
Summary: This study presents a solution strategy to stabilize the hole transport in organic layers of perovskite solar cells, resulting in improved hole conductivity and well-matched band alignment. The fabricated solar cells exhibited excellent durability and maintained high conversion efficiency under extreme conditions.
Article
Optics
Yuanbin Fan, Tingting Shi, Weijie Ji, Lai Zhou, Yang Ji, Zhiliang Yuan
Summary: Afterpulsing noise in InGaAs/InP single photon avalanche photodiodes can be suppressed by limiting the avalanche charge via sub-nanosecond gating. A novel ultra-narrowband interference circuit (UNIC) is proposed to reject the capacitive response while keeping photon signals intact. By cascading two UNIC's in a readout circuit, high count rates and low afterpulsing probabilities were achieved at different detection efficiencies and temperatures.
Article
Optics
Yuanfei Gao, Zhiliang Yuan
Summary: Quantum key distribution (QKD) is a promising technology for distributing secure encryption keys between distant users. The use of the decoy-state technique has greatly improved its practicality and performance, and is widely used in commercial systems. However, conventional intensity modulators can introduce security vulnerabilities in high-speed QKD systems. In this study, we analyze the transfer function of an in-phase/quadrature (IQ) modulator and demonstrate its superiority for stable decoy-state generation. IQ modulators, with their convenient two-level modulation and high-speed capabilities, are ideal for high-speed decoy-state QKD systems.
Article
Multidisciplinary Sciences
Lai Zhou, Jinping Lin, Yumang Jing, Zhiliang Yuan
Summary: Twin-field (TF) quantum key distribution (QKD) has emerged as a practical solution for long-distance secure fibre communication due to its repeater-like rate-loss scaling. However, the implementation complexity of TF-QKD can be a challenge. This study proposes a technique that stabilizes an open channel without the need for a closed interferometer, enabling a simple and versatile TF-QKD setup. The authors demonstrate the feasibility of this approach and achieve a finite-size rate of 0.32 bit/s at a distance of 615.6 km.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Applied
Qiang Zeng, Haoyang Wang, Huihong Yuan, Yuanbin Fan, Lai Zhou, Yuanfei Gao, Haiqiang Ma, Zhiliang Yuan
Summary: Quantum entanglement is a vital resource in quantum information processing, but the control of this resource has been overlooked. This work proposes a simple protocol to upgrade an entanglement source with access control through phase randomization. The enhanced source effectively controls users' utilization of the entanglement resource for quantum cryptography and serves as a practical countermeasure against memory attacks in device-independent quantum key distribution at a low cost.
PHYSICAL REVIEW APPLIED
(2023)
Article
Optics
Y. S. Lo, R. I. Woodward, N. Walk, M. Lucamarini, I. De Marco, T. K. Paraiso, M. Pittaluga, T. Roger, M. Sanzaro, Z. L. Yuan, A. J. Shields
Summary: Quantum key distribution (QKD) allows secure key exchange between users, but current systems rely on expensive and bulky modulators, limiting compactness. We propose a novel optical transmitter design using directly modulated lasers and coherent interference to generate intensity- and phase-tunable pulses at high speeds. Our design eliminates the need for bulk modulators, making it suitable for miniaturization and integration. We demonstrate a proof-of-principle QKD to showcase its potential applications.