A5015924459- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Quantum Mechanics and Applications
- Quantum optics and atomic interactions
- Photonic and Optical Devices
- Quantum-Dot Cellular Automata
- Optical Network Technologies
- Chaos-based Image/Signal Encryption
- Quantum and electron transport phenomena
- Neural Networks and Reservoir Computing
- Advancements in Semiconductor Devices and Circuit Design
- Semiconductor Quantum Structures and Devices
- Laser-Matter Interactions and Applications
- Digital Media Forensic Detection
- Semiconductor Lasers and Optical Devices
- Chalcogenide Semiconductor Thin Films
- Advanced Fiber Optic Sensors
- Magneto-Optical Properties and Applications
- Mechanical and Optical Resonators
- Chaos control and synchronization
- Advanced Optical Sensing Technologies
- Molecular Communication and Nanonetworks
- Optical Coatings and Gratings
- Phase-change materials and chalcogenides
- Random lasers and scattering media
Guangxi University
2017-2025
University of Science and Technology of China
2019-2021
Beijing Academy of Quantum Information Sciences
2021
Hefei National Center for Physical Sciences at Nanoscale
2019-2021
CAS Key Laboratory of Urban Pollutant Conversion
2019
Beijing University of Posts and Telecommunications
2013-2017
University of Toronto
2015-2016
Finding exponential separation between quantum and classical information tasks is like striking gold in research. Such an advantage believed to hold for computing but proven communication complexity. Recently, a novel resource called the switch---which creates coherent superposition of causal order events, known as causality---has been harnessed theoretically new protocol providing provable separation. We experimentally demonstrate such by realizing directions two-party distributed...
Measurement-device-independent quantum key distribution (MDI-QKD) can eliminate all detector side channels and it is practical with current technology. Previous implementations of MDI-QKD used two symmetric similar losses. However, the secret rate severely limited when different have Here we report results first high-rate experiment over asymmetric channels. By using recent 7-intensity optimization approach, demonstrate>10×higher than previous best-known protocols for in situation large...
Silicon-based polarization-encoding quantum key distribution (QKD) has been widely studied, owing to its low cost and robustness. However, prior studies have utilized off-chip devices demodulate the states or perform polarization compensation, given difficulty of fabricating polarized independent components on chip. In this paper we propose a fully chip-based decoder for QKD. The chip realizes state analyzer compensates BB84 protocol without requiring additional hardware. It is based...
Integrated photonics provides a promising platform for quantum key distribution (QKD) system in terms of miniaturization, robustness, and scalability. Tremendous QKD works based on integrated have been reported. Nonetheless, most current chip-based implementations require additional off-chip hardware to demodulate states or perform auxiliary tasks such as time synchronization polarization basis tracking. Here, we report demonstration resource-efficient BB84 with silicon-based encoder...
Decoy-state quantum key distribution (QKD) is a standard technique in current cryptographic implementations. Unfortunately, existing experiments have two important drawbacks: the state preparation assumed to be perfect without errors and employed security proofs do not fully consider finite-key effects for general attacks. These drawbacks mean that are guaranteed proven secure practice. Here, we perform an experiment shows QKD with imperfect preparations over long distances achieves rigorous...
Measurement-device-independent quantum key distribution (MDI-QKD), which is immune to all detector side-channel attacks, the most promising solution security issues in practical systems. Though several experimental demonstrations of MDI QKD have been reported, they make one crucial but not yet verified assumption, that there are no flaws state preparation. Such an assumption unrealistic and loopholes remain source. Here we present, our knowledge, first MDI-QKD experiment with preparation...
Abstract Quantum communication holds the promise of creating disruptive technologies that will play an essential role in future networks. For example, study quantum complexity has shown allows exponential reductions information must be transmitted to solve distributed computational tasks. Recently, protocols realize this advantage using optical implementations have been proposed. Here we report a proof-of-concept experimental demonstration fingerprinting system is capable transmitting less...
Measurement-device-independent quantum key distribution (MDI-QKD) removes all detector side channels and enables secure QKD with an untrusted relay. It is suitable for building a star-type access network, where the complicated expensive measurement devices are placed in central relay each user requires only low-cost transmitter, such as integrated photonic chip. Here, we experimentally demonstrate 1.25 GHz silicon chip-based MDI-QKD system using polarization encoding. The chip transmitters...
Quantum key distribution (QKD) enables two remote users to share a string of bits with information-theoretical security. Parameter optimization is crucial step in achieving optimal performance practical QKD systems. In general, such implemented using local search algorithm (LSA). However, LSAs inevitably fail find out the values when searched rate function nonconvex or has discontinuity first-order derivatives and narrow parameter space. This paper proposes genetic algorithm-based method...
We present a robust single photon circular quantum secret sharing (QSS) scheme with phase encoding over 50 km mode fiber network using QSS protocol. Our can automatically provide perfect compensation of birefringence and remain stable for long time. A high visibility 99.3% is obtained. Furthermore, our realizes polarization insensitive modulators. The this system be maintained perpetually without any adjustment to the every time we test system.
Superconducting nanowire single-photon detector (SNSPD) is a promising candidate for achieving high-rate quantum key distribution (QKD) over long distances, and it has been widely employed in recent QKD experiments. However, SNSPD naturally polarization sensitive, which, if unchecked, could leave back door an eavesdropper to perform hacking. Here, we experimentally study the dependency on detection efficiency of propose hacking attack exploit this vulnerability. We characterize...
Quantum key distribution (QKD), which theoretically provides unconditional secure communication, has developed rapidly in the past decades. However, practical QKD systems still have vulnerabilities due to device imperfections. Polarization-encoding are one of most important branches field QKD. To date, a variety polarization-encoding schemes been proposed meet requirements high speed and robust modulation, but security analysis these is often ignored. In this paper, we experimentally...
The nonadiabatic geometric quantum gate (NGQG) is promising for the realization of high-fidelity operation large-scale processing. Normally, conventional NGQGs can be especially robust to either Rabi error or detuning error, which are two typical errors in many computing platforms. However, it difficult suppress these types at same time. This remains a big challenge NGQGs. Here we present general framework implement optimized gate, where evolution path performed by using family composite...
The advantage distillation (AD) method has proven effective in improving the performance of quantum key distribution (QKD). In this paper we introduce AD into a recently proposed asynchronous measurement-device-independent (AMDI) QKD protocol, taking finite-key effects account. Simulation results show that significantly enhances AMDI QKD, e.g., extending transmission distance by 16 km with total pulse count $N=7.24\ifmmode\times\else\texttimes\fi{}{10}^{13}$, and enables previously unable to...
Quantum key distribution (QKD) is theoretically secure using the principle of quantum mechanics; therefore, QKD a promising solution for future communication. Although several experimental demonstrations have been reported, they not considered polarization-dependent loss in state preparation key-rate estimation. In this study, we experimentally characterized realistic state-preparation devices and verified that considerable exists fiber- silicon-based polarization modulators. Hence, security...
Mode-pairing quantum key distribution (MP-QKD) is an easy-to-implement scheme that transcends the Pirandola--Laurenza--Ottaviani--Banchi bound without using repeaters. In this paper, we present improvement of performance MP-QKD advantage distillation method. The simulation results demonstrate proposed extends transmission distance significantly with a channel loss exceeding 7.6 dB. Moreover, tolerates maximum bit error rate 8.9%, which nearly twice original MP-QKD. particular, as system...
Random numbers play a crucial role in numerous scientific applications. Source-independent quantum random number generators (SI-QRNGs) can offer true randomness by leveraging the fundamental principles of mechanics, eliminating need for trusted source. Silicon photonics demonstrates significant promise QRNG due to its benefits miniaturization, cost-effective device manufacturing, and compatibility with CMOS microelectronics. This study experimentally silicon-based discrete variable SI-QRNG....
The development of quantum networks is paramount towards practical and secure communications. Quantum digital signatures (QDS) offer an information-theoretically solution for ensuring data integrity, authenticity, non-repudiation, rapidly growing from proof-of-concept to robust demonstrations. However, previous QDS systems relied on expensive bulky optical equipment, limiting large-scale deployment reconfigurable networking construction. Here, we introduce verify a chip-based network,...