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arXiv · 2202.13593

Displacement-noise-free neutron interferometer for gravitational wave detection using a single Mach-Zehnder configuration

Shoki Iwaguchi·Atsushi Nishizawa·Yanbei Chen·Yuki Kawasaki·Masaaki Kitaguchi·Taigen Morimoto·Tomohiro Ishikawa·Bin Wu·Izumi Watanabe·Ryuma Shimizu·Hirohiko Shimizu·Yuta Michimura·Seiji Kawamura
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Abstract

The improvement of sensitivity to gravitational waves (GWs) at lower frequencies is still challenging on account of displacement noise. One of the solutions is the neutron displacement-noise-free interferometer (DFI). We focus on a simplification of the detector configuration by taking advantage of the ability to adjust the neutron speed depending on the configuration. The new configuration consists of two beamsplitters and two mirrors, which constitute a single Mach-Zehnder interferometer (MZI). It is simpler than the configuration with two MZIs in previous research. All displacement noise of mirrors and beamsplitters can be canceled in the frequency domain. This cancellation can be explained intuitively using a phasor diagram.

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Shoki Iwaguchi, Atsushi Nishizawa, Yanbei Chen, Yuki Kawasaki, Masaaki Kitaguchi, Taigen Morimoto, Tomohiro Ishikawa, Bin Wu, Izumi Watanabe, Ryuma Shimizu, Hirohiko Shimizu, Yuta Michimura, Seiji Kawamura. 2022-02-28. Displacement-noise-free neutron interferometer for gravitational wave detection using a single Mach-Zehnder configuration. https://doi.org/10.1016/j.physleta.2022.128150

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