期刊
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
卷 29, 期 19, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217751X14430040
关键词
Axion; dark matter; microwave cavity; superconductivity; Josephson parametric amplifiers
资金
- National Science Foundation [PHY-1067242, PHY-1306729]
- U.S. Department of Energy by Lawrence Livermore National Security, LLC, Lawrence Livermore National Laboratory [DE-AC52-07NA27344.]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1306736] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1306729, 1067242] Funding Source: National Science Foundation
The axion is a light pseudoscalar particle which suppresses CP-violating effects in strong interactions and also happens to be an excellent dark matter candidate. Axions constituting the dark matter halo of our galaxy may be detected by their resonant conversion to photons in a microwave cavity permeated by a magnetic field. The current generation of the microwave cavity experiment has demonstrated sensitivity to plausible axion models, and upgrades in progress should achieve the sensitivity required for a definitive search, at least for low mass axions. However, a comprehensive strategy for scanning the entire mass range, from 1-1000 mu eV, will require significant technological advances to maintain the needed sensitivity at higher frequencies. Such advances could include sub-quantum-limited amplifiers based on squeezed vacuum states, bolometers, and/or superconducting microwave cavities. The Axion Dark Matter eXperiment at High Frequencies (ADMX-HF) represents both a pathfinder for first data in the 20-100 mu eV range (similar to 5-25 GHz), and an innovation test-bed for these concepts.
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