期刊
NEW JOURNAL OF PHYSICS
卷 22, 期 9, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1367-2630/abaace
关键词
dark matter; atomic clock; quantum sensor; fine structure constant
资金
- Labex FIRST-TF
- Agence Nationale de la Recherche [ANR-10-LABX-48-01, ANR-11-EQPX-0039, ANR-10-IDEX-0001-02]
- European Union's Horizon 2020 program: ERC AdOC Grant [617553]
- German Research Foundation DFG [EXC 2123, CRC 1227, CRC 1128, RTG 1729]
- European Metrology Programme for Innovation and Research (EMPIR) [15SIB03 (OC18), 15SIB05]
- European Union's Horizon 2020 research and innovation programme
- EMPIR Participating States within EURAMET
- European Union
- UK Department for Business, Energy and Industrial Strategy
- Max Planck-RIKEN-PTB Center for Time, Constants and Fundamental Symmetries
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 |delta alpha/alpha| < 5 x 10(-17)for transients of duration 10(3)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 (greater than or similar to 10(4)km) objects.
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