A5100381996- Quantum Information and Cryptography
- Quantum Mechanics and Applications
- Quantum Computing Algorithms and Architecture
- Quantum optics and atomic interactions
- Advanced Fiber Laser Technologies
- Advanced Optical Sensing Technologies
- Photonic and Optical Devices
- Advanced Fluorescence Microscopy Techniques
- Gyrotron and Vacuum Electronics Research
- Advanced Frequency and Time Standards
- Spectroscopy and Laser Applications
- Advanced Chemical Physics Studies
- Microwave Engineering and Waveguides
- Pulsed Power Technology Applications
- Orbital Angular Momentum in Optics
- Photorefractive and Nonlinear Optics
- Optical Coherence Tomography Applications
- Atmospheric Ozone and Climate
- Laser-Matter Interactions and Applications
- Mechanical and Optical Resonators
- Neural Networks and Reservoir Computing
- Atomic and Subatomic Physics Research
- Quantum and electron transport phenomena
- Advanced Clustering Algorithms Research
- Advanced Computational Techniques and Applications
University of Science and Technology of China
2016-2025
Hefei National Center for Physical Sciences at Nanoscale
2016-2025
Jinan Institute of Quantum Technology
2014-2025
Chinese Academy of Sciences
2010-2025
Guangxi Institute of Botany
2025
Beijing Academy of Quantum Information Sciences
2020-2024
Institute of Botany
2024
Shandong University
2024
Jiangnan University
2024
Shanghai Institute of Technical Physics
2021-2024
In principle, quantum key distribution (QKD) offers information-theoretic security based on the laws of physics. practice, however, imperfections realistic devices might introduce deviations from idealized models used in analyses. Can code-breakers successfully hack real systems by exploiting side channels? code-makers design innovative counter-measures to foil code-breakers? This article reviews theoretical and experimental progress practical aspects code-making code-breaking. After...
Measurement-device-independent quantum key distribution (MDIQKD) with the decoy-state method negates security threats of both imperfect single-photon source and detection losses. Lengthening distance improving rate (QKD) are vital issues in practical applications QKD. Herein, we report results MDIQKD over 404 km ultralow-loss optical fiber 311 a standard while employing an optimized four-intensity method. This record-breaking implementation not only provides new record for all types QKD...
Throughout history, every advance in encryption has been defeated by advances hacking with severe consequences. Quantum cryptography holds the promise to end this battle offering unconditional security when ideal single-photon sources and detectors are employed. Unfortunately, devices never exist practice device imperfections have become targets of various attacks. By developing up-conversion high efficiency low noise, we build up a measurement-device-independent quantum key distribution...
Twin-field (TF) quantum key distribution (QKD) promises high rates over long distances to beat the rate-distance limit. Here, applying sending-or-not-sending TF QKD protocol, we experimentally demonstrate a secure that breaks absolute key-rate limit of repeaterless 509-km-long ultralow loss optical fiber. Two independent lasers are used as sources with remote-frequency-locking technique 500-km fiber distance. Practical fibers path appropriate noise filtering; and finite-key effects...
Measurement-device-independent quantum key distribution (MDIQKD) protocol is immune to all attacks on detection and guarantees the information-theoretical security even with imperfect single photon detectors. Recently, several proof-of-principle demonstrations of MDIQKD have been achieved. Those experiments, although novel, are implemented through limited distance a rate less than 0.1 bps. Here, by developing 75 MHz clock fully-automatic highly-stable system, superconducting nanowire...
We report on entanglement-based quantum key distribution between a low-Earth-orbit satellite equipped with space borne entangled-photon source and ground observatory. One of the entangled photons is measured locally at satellite, other one sent via down link to receiver in Delingha station. The attenuation vary from 29 dB 530 km 36 1000 km. observe that two-photon entanglement survives after being distributed ground, state fidelity ≥0.86. then perform protocol obtain an average final rate...
Channel loss seems to be the most severe limitation on practical application of long distance quantum key distribution. The idea twin-field distribution can improve rate from linear scale channel in traditional decoy-state method square root transmittance. However, technical demanding is rather tough because it requests single photon level interference two remote independent lasers. Here, we adopt technology developed frequency and time transfer lock lasers' wavelengths utilize additional...
Quantum key distribution (QKD) provides information-theoretic security based on the laws of quantum mechanics.The desire to reduce costs and increase robustness in realworld applications has motivated study coexistence between QKD intense classical data traffic a single fiber.Previous works metropolitan areas have used wavelength-division multiplexing, however, backbone fiber networks remains great experimental challenge, as Tbps up 20 dBm optical power is transferred, much more noise...
Long-range active imaging has a variety of applications in remote sensing and target recognition. Single-photon LiDAR (light detection ranging) offers single-photon sensitivity picosecond timing resolution, which is desirable for high-precision three-dimensional (3D) over long distances. Despite important progress, further extending the range presents enormous challenges because only weak echo photons return are mixed with strong noise. Herein, we tackled these by constructing...
Quantum key distribution (QKD) aims to generate secure private keys shared by two remote parties. With its security being protected principles of quantum mechanics, some technology challenges remain towards practical application QKD. The major one is the distance limit, which caused fact that a signal cannot be amplified while channel loss exponential with for photon transmission in optical fiber. Here using 3-intensity sending-or-not-sending protocol actively-odd-parity-pairing method, we...
Significance Non–line-of-sight (NLOS) imaging can recover details of a hidden scene from the indirect light that has scattered multiple times. Despite recent advances, NLOS remained at short-range verifications. Here, both experimental and conceptual innovations yield hardware software solutions to increase meter kilometer range. This range is about three orders magnitude longer than previous experiments. The results will open avenues for development techniques relevant applications...
Quantum key distribution endows people with information-theoretical security in communications. Twin-field quantum (TF-QKD) has attracted considerable attention because of its outstanding rates over long distances. Recently, several demonstrations TF-QKD have been realized. Nevertheless, those experiments are implemented the laboratory, and therefore a critical question remains about whether is feasible real-world circumstances. Here, by adopting sending-or-not-sending twin-field QKD...
In this paper, we employ theoretical and experimental efforts realize a proof-of-principle verification of device-independent QKD based on the photonic setup. On side, enhance loss tolerance for real device imperfections by combining different approaches, namely, random post-selection, noisy preprocessing, developed numerical methods to estimate key rate via von Neumann entropy. develop high-quality polarization-entangled photon source achieving state-of-the-art (heralded) detection...