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11 papers · 2 filters
Entropic uncertainty relations for SIC-POVMs and MUMs
Shan Huang, Zeng-Bing Chen, Shengjun Wu
We construct inequalities between Rényi entropy and the indexes of coincidence of probability distributions, based on which we obtain improved state-dependent entropic uncertainty…
Open-destination measurement-device-independent quantum key distribution network
Wen-Fei Cao, Yi-Zheng Zhen, Yu-Lin Zheng +6
Quantum key distribution (QKD) networks hold promise for sharing secure randomness over multi-partities. Most existing QKD network schemes and demonstrations are based on trusted r…
Perfect coherent transfer in an on-chip reconfigurable nanoelectromechanical network
Tian Tian, Shaochun Lin, Liang Zhang +5
Realizing a controllable network with multiple degrees of interaction is a challenge to physics and engineering. Here, we experimentally report an on-chip reconfigurable network ba…
Single-photon scattering controlled by an imperfect cavity
Liwei Duan, Qing-Hu Chen
We study the single-photon transport in the coupled-resonator waveguide (CRW) controlled by an imperfect cavity. A Lorentzian spectrum is introduced to describe the dissipation. We…
symmetry of a square-wave modulated two-level system
Liwei Duan, Yan-Zhi Wang, Qing-Hu Chen
We study a non-Hermitian two-level system with square-wave modulated dissipation and coupling. Based on the Floquet theory, we achieve an effective Hamiltonian from which the bound…
Approaching quantum-limited metrology with imperfect detectors by using weak-value amplification
Liang Xu, Zexuan Liu, Animesh Datta +4
Weak value amplification (WVA) is a metrological protocol that amplifies ultra-small physical effects. However, the amplified outcomes necessarily occur with highly suppressed prob…