期刊
SCIENCE ADVANCES
卷 4, 期 12, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aau4869
关键词
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资金
- European Union under the European Regional Development Fund
- EMPIR Programme
- European Union's Horizon 2020 Research and Innovation Programme
- NIST
- NASA fundamental physics
- DARPA QuASAR
- Agence Nationale de la Recherche [Labex First-TF ANR-10-LABX-48-01]
- Centre National d'Etudes Spatiales (CNES)
- Conseil Regional Ile-de-France (DIM Nano'K)
- National Science Centre, Poland [2015/19/D/ST2/02195]
- Polish Ministry of Science and Higher Education Mobility Plus Program
- National Science Centre, Poland, under QuantERA programme [2017/25/Z/ST2/03021]
- Polish National Science Centre [2016/21/D/ST4/00903]
- Polish Ministry of Science and Higher Education
- U.S. Department of Commerce, NIST [70NANB18H006]
- [EMPIR 15SIB03 OC18]
We report on the first Earth-scale quantumsensor network based on optical atomic clocks aimed at dark matter (DM) detection. Exploiting differences in the susceptibilities to the fine-structure constant of essential parts of an optical atomic clock, i.e., the cold atoms and the optical reference cavity, we can perform sensitive searches for DM signatures without the need for real-time comparisons of the clocks. We report a two orders of magnitude improvement in constraints on transient variations of the fine-structure constant, which considerably improves the detection limit for the standard model (SM)-DM coupling. We use Yb and Sr optical atomic clocks at four laboratories on three continents to search for both topological defect and massive scalar field candidates. No signal consistent with a DM coupling is identified, leading to considerably improved constraints on the DM-SM couplings.
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