A5100641051- Quantum Information and Cryptography
- Quantum Mechanics and Applications
- Advanced Optical Sensing Technologies
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Quantum optics and atomic interactions
- Quantum Computing Algorithms and Architecture
- Spectroscopy and Laser Applications
- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Analytical Chemistry and Sensors
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Mechanical and Optical Resonators
- Atomic and Subatomic Physics Research
- Advanced Battery Technologies Research
- Laser Design and Applications
- Neural Networks and Reservoir Computing
- Advanced ceramic materials synthesis
- Advanced Fluorescence Microscopy Techniques
- Atmospheric Ozone and Climate
- Microgrid Control and Optimization
- Orbital Angular Momentum in Optics
- Nanowire Synthesis and Applications
- Electrical and Thermal Properties of Materials
Chinese Academy of Sciences
2016-2025
Anhui Institute of Optics and Fine Mechanics
1993-2025
Research Center for Eco-Environmental Sciences
2013-2025
National Taipei University of Technology
2025
China University of Geosciences (Beijing)
2025
China University of Geosciences
2025
Shanghai Institute of Microsystem and Information Technology
2015-2024
Kunming University of Science and Technology
2021-2024
Fujian Electric Power Survey & Design Institute
2020-2024
Jiangxi University of Finance and Economics
2024
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...
Gaussian boson sampling exploits squeezed states to provide a highly efficient way demonstrate quantum computational advantage. We perform experiments with 50 input single-mode high indistinguishability and squeezing parameters, which are fed into 100-mode ultralow-loss interferometer full connectivity random transformation, sampled using 100 high-efficiency single-photon detectors. The whole optical set-up is phase-locked maintain coherence between the superposition of all photon number...
Entangled-photon sources with simultaneously near-unity heralding efficiency and indistinguishability are the fundamental elements for scalable photonic quantum technologies. We design realize a degenerate telecommunication wavelength entangled-photon source from an ultrafast pulsed laser pumped spontaneous parametric down-conversion (SPDC), which shows 97% 96% between independent single photons without narrow-band filtering. Such beamlike frequency-uncorrelated SPDC allows generation of...
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...
We report phase-programmable Gaussian boson sampling (GBS) which produces up to 113 photon detection events out of a 144-mode photonic circuit. A new high-brightness and scalable quantum light source is developed, exploring the idea stimulated emission squeezed photons, has simultaneously near-unity purity efficiency. This GBS programmable by tuning phase input states. The obtained samples are efficiently validated inferring from computationally friendly subsystems, rules hypotheses...
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...
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) 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...
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...
As renewable energy continues to be integrated into the grid, storage has become a vital technique supporting power system development. To effectively promote efficiency and economics of storage, centralized shared (SES) station with multiple batteries is developed enable trading among group entities. In this paper, we propose optimal operation dynamic partitioning strategy for SES station, considering day-ahead demands large-scale plants. We implement multi-entity cooperative optimization...
Measurement-device-independent quantum key distribution (MDI-QKD), based on two-photon interference, is immune to all attacks against the detection system and allows a QKD network with untrusted relays. Since MDI-QKD protocol was proposed, fibre-based implementations have been rapidly developed towards longer distance, higher rates, verification. However, owing effect of atmospheric turbulence, over free-space channel remains experimentally challenging. Here, by developing robust adaptive...
Quantum cryptography holds the promise to establish an information-theoretically secure global network. All field tests of metropolitan-scale quantum networks date are based on trusted relays. The security critically relies accountability relays, which will break down if relay is dishonest or compromised. Here, we construct a measurement-device-independent key distribution (MDIQKD) network in star topology over 200 square kilometers metropolitan area, against untrustful relays and all...
Jitter is one of the key parameters for a superconducting nanowire single photon detector (SNSPD). Using an optimized time-correlated counting system jitter measurement, we extensively studied dependence on bias current and working temperature. The signal-to-noise ratio single-photon-response pulse was proven to be important factor in jitter. final reduced 18 ps by using high-critical-current SNSPD, which showed intrinsic SNSPD 15 ps. A laser ranging experiment 15-ps achieved record depth...
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...
Periodically driven systems have displayed a variety of fascinating phenomena without analogies in static systems, which enrich the classification quantum phases matter and stimulate wide range research interests. Here, we employ discrete-time walks to investigate nontrivial topological effect unique two-dimensional periodically system: chiral edge states can exist at interface Floquet insulators whose Chern numbers vanish. Thanks resource-saving flexible fiber-loop architecture, realize...