基于硅片的纠缠光子源的量子时钟同步

IF 5.6 2区 物理与天体物理 Q1 OPTICS
Hui Han, Jia-ao Li, Bang-Ying Tang, Jia-hao Li, Jin-quan Huang, Huan Chen, Wan-Rong Yu, Bo Liu, Shu-hui Chen
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引用次数: 0

摘要

利用量子纠缠和压缩的特性,量子时钟同步在提高精度和安全性方面具有显著优势。对于可扩展的量子时钟同步网络,开发精确的时间偏差分析模型对于表征长期定时稳定性和在实际系统中实现可靠部署至关重要。本文提出了一种基于cram - rao下界的同步稳定性分析模型,该模型建立了理论上可实现的时间偏差。我们通过实验验证了该模型,使用超过50公里光纤的往返量子时钟同步协议,采用集成硅光子芯片,通过四波混频产生频率纠缠光子对。结果表明,在平均10,240秒的时间内,同步精度为15.08 ps,时间偏差为901 fs,而我们的模型分析显示标准偏差为12.21 ps。这项工作为构建鲁棒的大规模量子网络提供了基础框架。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quantum clock synchronization with the silicon-chip based entangled photon source

Leveraging the properties of quantum entanglement and squeezing, quantum clock synchronization offers significant advantages in improving precision and security. For scalable quantum clock synchronization networks, developing an accurate time deviation analysis model is essential to characterize long-term timing stability and enable reliable deployment in real-world systems. This paper proposes a synchronization stability analysis model that establishes the theoretically achievable time deviation based on the Cramér-Rao lower bound. We experimentally validate this model using a round-trip quantum clock synchronization protocol over 50 km of fiber, employing an integrated silicon-photonic chip that generates frequency-entangled photon pairs via four-wave mixing. Results show a synchronization accuracy of 15.08 ps and a time deviation of 901 fs at an averaging time of 10,240 seconds, while our model analysis shows a standard deviation of 12.21 ps. This work provides a fundamental framework for building robust, large-scale quantum networks.

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来源期刊
EPJ Quantum Technology
EPJ Quantum Technology Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
7.70
自引率
7.50%
发文量
28
审稿时长
71 days
期刊介绍: Driven by advances in technology and experimental capability, the last decade has seen the emergence of quantum technology: a new praxis for controlling the quantum world. It is now possible to engineer complex, multi-component systems that merge the once distinct fields of quantum optics and condensed matter physics. EPJ Quantum Technology covers theoretical and experimental advances in subjects including but not limited to the following: Quantum measurement, metrology and lithography Quantum complex systems, networks and cellular automata Quantum electromechanical systems Quantum optomechanical systems Quantum machines, engineering and nanorobotics Quantum control theory Quantum information, communication and computation Quantum thermodynamics Quantum metamaterials The effect of Casimir forces on micro- and nano-electromechanical systems Quantum biology Quantum sensing Hybrid quantum systems Quantum simulations.
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