| Project/Area Number |
20K14460
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Stadnik Yevgeny 東京大学, カブリ数物連携宇宙研究機構, 特任助教 (60866797)
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| Project Period (FY) |
2020-04-01 – 2022-03-31
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| Project Status |
Discontinued (Fiscal Year 2021)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | Dark matter / Atomic clock / Quantum sensor / Dark energy / Dark sector / Spectroscopy / Magnetometry / Interferometry |
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| Outline of Research at the Start |
This research project aims to develop new methods and experiments that would allow for the identification of dark matter and the elucidation of its microscopic properties. The possibility of leveraging existing and developing technologies that are used in practical everyday applications will be explored, including the use of spectroscopy, magnetometry and interferometry techniques. These technologies should enable scientists to probe regions of physical parameter space (such as dark matter particle masses) that have been little, or not at all, searched thus far.
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| Outline of Annual Research Achievements |
Research was undertaken on the possibility of detecting relativistic bosonic waves that originate from sources which are initially non-relativistic. It was found that terrestrial experiments can in principle be sensitive to such relativistic waves even when the astrophysical sources are located quite far away from Earth. However, depending on the model of bosons considered, detection on Earth may be complicated due to screening of such bosonic waves close to Earth's surface. In this case, significantly more sensitive approaches would involve the use of space-based detectors. The use of networks of detectors containing spatially-separated nodes would allow for unambiguous confirmation of extra-terrestrial signals from passing relativistic bosonic waves and the location of the sources.
Further research was undertaken to appraise the feasibility of networks of quantum sensors (including ground- and space-based networks) in searches for new physics. It was concluded that such networks offer significant opportunities in searches for dark matter and the broader dark sector. For example, the use of a network of atomic clocks can boost the sensitivity to dark matter compared with a single atomic-clock node, as well as provide valuable information about the spatio-temporal correlation function. Space-based atomic clocks, e.g. on-board the International Space Station or GPS satellites, can provide an enormous advantage over analogous experiments on Earth in models of dark scalar fields that exhibit screening near Earth's surface.
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