Xiaogang Qiang

Hacking single-photon avalanche detectors in quantum key distribution via pulse illumination

2020 · Optics Express

Quantum key distribution (QKD) has been proved to be information-theoretically secure in theory. Unfortunately, the imperfect devices in practice compromise its security. Thus, to improve the security property of practical QKD systems, a commonly used …

High-efficiency Weak-trace-free Counterfactual Communication via Quantum Zeno Effect

2025 · arXiv (Cornell University)

The quantum Zeno effect, which inhibits quantum state evolution via repeated weak measurements, significantly enhances the efficiency of interaction-free measurement (IFM). This fundamental mechanism facilitates high-efficiency counterfactual quantum communication, enabling information delivery without particle transmission …