IT之家 RSS@ithome_rss P.180476

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IT之家 RSS@ithome_rss P.180476

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160 亿年仅误差 1 秒、全球第二个实现，我国光晶格钟主要性能达到世界领先水平 Telegraph | 原文

160 亿年仅误差 1 秒、全球第二个实现，我国光晶格钟主要性能达到世界领先水平 - IT之家

IT之家 7 月 3 日消息，原子钟是一种利用原子量子特性产生高度稳定且准确频率信号的仪器，也是目前测量时间最精确的工具。据“中科院之声”今日消息，中国科学院国家授时中心（以下简称授时中心）在 87Sr 光晶格原子钟系统领域取得了突破进展，使我国在光晶格钟主要性能上达到世界领先水平，成为第二个实现光晶格钟频率不确定度和频率不稳定度均优于 2×10-18（相当于连续运行 160 亿年误差一秒）的国家。目前，“秒”的定义为：位于海平面上的133Cs 原子基态的两个超精细能级，在零磁场中跃迁辐射 9192631770…

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Create: 2025-07-03
Last Update: 2025-07-28 22:03:25

IT之家
160 亿年仅误差 1 秒、全球第二个实现，我国光晶格钟主要性能达到世界领先水平 Telegraph | 原文

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