Fundamental physics with a state-of-the-art optical clock in space
Fundamental physics with a state-of-the-art optical clock in space
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DOI：
10.1088/2058-9565/ac7df9
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发表时间：
2022-10-01
影响因子：
6.7
通讯作者：
Yu, Nan
中科院分区：
文献类型：
--
作者：
Derevianko, Andrei;Gibble, Kurt;Yu, Nan
光学原子钟和光学时间传递的最新进展为基础物理测试和计时应用的精密计量提供了新的可能性。在这里，我们描述了一个空间使命的概念，将放置一个国家的最先进的光学原子钟在偏心轨道围绕地球。高稳定性的激光链路将把轨道航天器与地面站的相对时间、距离和速度连接起来。这项使命的主要目标是测试引力红移，这是广义相对论的一个经典测试，灵敏度超过目前的极限30000倍。其他科学目标包括相对论的其他测试，加强对暗物质和基本常数漂移的搜索，以及建立高精度的国际时间/测地基准。
Recent advances in optical atomic clocks and optical time transfer have enabled new possibilities in precision metrology for both tests of fundamental physics and timing applications. Here we describe a space mission concept that would place a state-of-the-art optical atomic clock in an eccentric orbit around Earth. A high stability laser link would connect the relative time, range, and velocity of the orbiting spacecraft to earthbound stations. The primary goal for this mission would be to test the gravitational redshift, a classical test of general relativity, with a sensitivity 30 000 times beyond current limits. Additional science objectives include other tests of relativity, enhanced searches for dark matter and drifts in fundamental constants, and establishing a high accuracy international time/geodesic reference.