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量子态的高效可控传输,是推动量子密钥分发、量子计算机组件间通信等核心功能落地的关键环节。然而,传统依赖实空间对称性的量子网络设计,既严格限制了拓扑结构的灵活调整,又难以兼顾传输保真度与实验稳定性。同时,网络扩展易引发对称性破坏,严重制约了量子系统的实用化与规模化发展。

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隐藏对称网络助量子传输“突破束缚”
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    量子态的高效可控传输,是推动量子密钥分发、量子计算机组件间通信等核心功能落地的关键环节。然而,传统依赖实空间对称性的量子网络设计,既严格限制了拓扑结构的灵活调整,又难以兼顾传输保真度与实验稳定性。同时,网络扩展易引发对称性破坏,严重制约了量子系统的实用化与规模化发展。

    . 隐藏对称网络助量子传输“突破束缚”. 科技导报, 2026 , 44 (2) : 4 -4 .
    . Science & Technology Review, 2026 , 44 (2) : 4 -4 .
    量子态的高效可控传输,是推动量子密钥分发、量子计算机组件间通信等核心功能落地的关键环节。然而,传统依赖实空间对称性的量子网络设计,既严格限制了拓扑结构的灵活调整,又难以兼顾传输保真度与实验稳定性。同时,网络扩展易引发对称性破坏,严重制约了量子系统的实用化与规模化发展。
    针对这一难题,德国罗斯托克大学联合汉堡大学等机构的研究团队,创新性地将“隐藏对称性”与集成光子技术相结合,提出了基于隐藏对称光子网络的量子态传输方案。研究团队通过紧束缚哈密顿量描述网络结构,利用连续时间量子行走理论分析量子态演化,明确“移除两节点后特征值谱一致”的隐藏对称位点定义,构建了飞秒激光直写的波导阵列实验平台。
    实验结果表明,该方案在814 nm波长下可以实现75% 的量子态传输保真度,且单态节点可支持网络无对称性破坏扩展;双光子反对称激发实验进一步证实了量子干涉保留特性,成功达成“近乎完美的量子态传输”。此外,该方案仅需满足2项与网络特性相关的条件,避开了传统完美态传输对参数的严苛要求,有效降低了环境噪声与硬件误差的影响。
    (来源于中国科技期刊卓越行动计划入选期刊:《eLight》,2025,6:3)

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    鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
    小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
    多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
    红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
    小菇属 Mycena 11 5.26
    光柄菇属 Pluteus 5 2.39
    红菇属 Russula 17 8.13
    栓菌属 Trametes 5 2.39
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