Search for transient variations of the fine structure constant and dark matter using fiber-linked optical atomic clocks
Search for transient variations of the fine structure constant and dark matter using fiber-linked optical atomic clocks
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DOI：
10.1088/1367-2630/abaace
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发表时间：
2019-07
影响因子：
3.3
通讯作者：
B. Roberts;P. Delva;A. Al-Masoudi;A. Amy-Klein;C. Baerentsen;C. Baynham;E. Benkler;S. Bilicki;S. Bize;W. Bowden;J. Calvert;Victor Cambier;E. Cantin;E. A. Curtis;S. Dorscher;M. Favier;F. Frank;P. Gill;R. Godun;G. Grosche;C. Guo;A. Hees;I. Hill;R. Hobson;N. Huntemann;J. Kronjager;S. Koke;A. Kuhl;R. Lange;T. Legero;B. Lipphardt;C. Lisdat;J. Lodewyck;O. Lopez;H. Margolis;H. 'Alvarez-Mart'inez;F. Meynadier;F. Ozimek;E. Peik;P. Pottie;N. Quintin;C. Sanner;L. D. Sarlo;M. Schioppo;R. Schwarz;A. Silva;U. Sterr;C. Tamm;R. L. Targat;P. Tuckey;G. Vallet;T. Waterholter;D. Xu;P. Wolf
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作者：
B. Roberts;P. Delva;A. Al-Masoudi;A. Amy-Klein;C. Baerentsen;C. Baynham;E. Benkler;S. Bilicki;S. Bize;W. Bowden;J. Calvert;Victor Cambier;E. Cantin;E. A. Curtis;S. Dorscher;M. Favier;F. Frank;P. Gill;R. Godun;G. Grosche;C. Guo;A. Hees;I. Hill;R. Hobson;N. Huntemann;J. Kronjager;S. Koke;A. Kuhl;R. Lange;T. Legero;B. Lipphardt;C. Lisdat;J. Lodewyck;O. Lopez;H. Margolis;H. 'Alvarez-Mart'inez;F. Meynadier;F. Ozimek;E. Peik;P. Pottie;N. Quintin;C. Sanner;L. D. Sarlo;M. Schioppo;R. Schwarz;A. Silva;U. Sterr;C. Tamm;R. L. Targat;P. Tuckey;G. Vallet;T. Waterholter;D. Xu;P. Wolf
我们使用来自欧洲光纤连接光学原子钟网络的数据寻找精细结构常数的瞬态变化。通过搜索整个网络中记录的时钟频率比较中的相干变化，我们显着改善了对精细结构常数瞬态变化的约束。例如，对于持续时间为103 s的瞬变，我们将变化限制为|δα/α| < 5 × 10−17。这种分析也提供了寻找暗物质的可能性，暗物质是一种神秘的物质，被认为可以解释星系动力学和其他天体物理现象，被认为是控制宇宙物质密度的。在目前的灵敏度水平上，我们没有发现以拓扑缺陷形式存在暗物质的证据（或者更一般地说，任何宏观物体），因此我们对暗物质和标准模型粒子之间的某些潜在耦合施加了限制，大大改进了现有的限制，特别是对于大型（≥104 km）的物体。
We search for transient variations of the fine structure constant using data from a European network of fiber-linked optical atomic clocks. By searching for coherent variations in the recorded clock frequency comparisons across the network, we significantly improve the constraints on transient variations of the fine structure constant. For example, we constrain the variation to |δα/α| < 5 × 10−17 for transients of duration 103 s. This analysis also presents a possibility to search for dark matter, the mysterious substance hypothesised to explain galaxy dynamics and other astrophysical phenomena that is thought to dominate the matter density of the universe. At the current sensitivity level, we find no evidence for dark matter in the form of topological defects (or, more generally, any macroscopic objects), and we thus place constraints on certain potential couplings between the dark matter and standard model particles, substantially improving upon the existing constraints, particularly for large (≳104 km) objects.