期刊
PHYSICAL REVIEW D
卷 105, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.105.124017
关键词
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资金
- JSPS KAKENHI [JP19K21875, JP19H01894, JP20H04726]
- Inamori Foundation
This paper proposes a neutron displacement noise-free interferometer that utilizes neutrons instead of light to lower the sensitive frequency band, making it capable of detecting gravitational waves inaccessible by ordinary laser interferometers.
An interferometer design that cancels all displacement noises of its test masses and maintains a gravitational-wave (GW) signal by combining multiple detector signals is called a displacement noise-free interferometer (DFI). The idea has been considered previously for a laser interferometer. However, a limitation of a laser DFI is that its sensitive frequency band is too high for astrophysical GW sources, similar to 10(5) Hz even for a kilometer-sized interferometer. To circumvent this limitation, in this paper, we propose a neutron DFI, in which neutrons are used instead of light. Since neutrons have velocities much lower than the speed of light, the sensitive frequency band of a neutron DFI can be lowered down to similar to 10(-1) Hz. Therefore, a neutron DFI can be utilized for detecting GWs that are inaccessible by an ordinary laser interferometer on the ground.
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