535 citations · 1.2k across the 37 of their papers we have counts for
39 papers
Searches for ultralight vector and axion dark matter with KAGRA
Yuta Michimura, Takumi Fujimori, Hiroki Fujimoto +10
We have proposed using laser interferometric gravitational wave detectors to search for ultralight vector and axion dark matter. Vector dark matter can be probed through oscillatin…
Optimization of quantum noise in space gravitational-wave antenna DECIGO with optical-spring quantum locking considering mixture of vacuum fluctuations in homodyne detection
Kenji Tsuji, Tomohiro Ishikawa, Kentaro Komori +10
Quantum locking using optical spring and homodyne detection has been devised to reduce quantum noise that limits the sensitivity of DECIGO, a space-based gravitational wave antenna…
Quantum-enhanced optical phase-insensitive heterodyne detection beyond 3-dB noise penalty of image band
Keitaro Anai, Yutaro Enomoto, Hiroto Omura +4
Optical phase-insensitive heterodyne (beat-note) detection, which measures the relative phase of two beams at different frequencies through their interference, is a key sensing tec…
First results of axion dark matter search with DANCE
Yuka Oshima, Hiroki Fujimoto, Jun'ya Kume +7
Axions are one of the well-motivated candidates for dark matter, originally proposed to solve the strong CP problem in particle physics. Dark matter Axion search with riNg Cavity E…
First-step experiment in developing optical-spring quantum locking for DECIGO: sensitivity optimization for simulated quantum noise by completing the square
Tomohiro Ishikawa, Yuki Kawasaki, Kenji Tsuji +12
DECi-hertz Interferometer Gravitational Wave Observatory (DECIGO) is a future mission for a space-borne laser interferometer. DECIGO has 1,000-km-long arm cavities mainly to detect…
Input optics systems of the KAGRA detector during O3GK
T. Akutsu, M. Ando, K. Arai +246
KAGRA, the underground and cryogenic gravitational-wave detector, was operated for its solo observation from February 25th to March 10th, 2020, and its first joint observation with…
Stochastic effects on observation of ultralight bosonic dark matter
Hiromasa Nakatsuka, Soichiro Morisaki, Tomohiro Fujita +4
Ultralight bosonic particles are fascinating candidates of dark matter (DM). It behaves as classical waves in our Galaxy due to its large number density. There have been various me…
Optimization of Design Parameters for Gravitational Wave Detector DECIGO Including Fundamental Noises
Yuki Kawasaki, Ryuma Shimizu, Tomohiro Ishikawa +6
The DECi hertz Interferometer Gravitational-Wave Observatory (DECIGO) is a space gravitational wave (GW) detector. DECIGO was originally designed to be sensitive enough to observe…
Ultralight dark matter searches with KAGRA gravitational wave telescope
Yuta Michimura, Tomohiro Fujita, Jun'ya Kume +5
Among various dark matter candidates, bosonic ultralight fields with masses below 1~eV are well motivated. Recently, a number of novel approaches have been put forward to search fo…
First observation and analysis of DANCE: Dark matter Axion search with riNg Cavity Experiment
Yuka Oshima, Hiroki Fujimoto, Masaki Ando +9
Dark matter Axion search with riNg Cavity Experiment (DANCE) was proposed to search for axion dark matter [Phys. Rev. Lett. 121, 161301 (2018)]. We aim to detect the rotation and o…
Dark matter Axion search with riNg Cavity Experiment DANCE: Design and development of auxiliary cavity for simultaneous resonance of linear polarizations
Hiroki Fujimoto, Yuka Oshima, Masaki Ando +4
Axion-like particles (ALPs) are undiscovered pseudo-scalar particles that are candidates for ultralight dark matter. ALPs interact with photons slightly and cause the rotational os…
Axion dark matter search using arm cavity transmitted beams of gravitational wave detectors
Koji Nagano, Hiromasa Nakatsuka, Soichiro Morisaki +3
Axion is a promising candidate for ultralight dark matter which may cause a polarization rotation of laser light. Recently, a new idea of probing the axion dark matter by optical l…
Dark matter Axion search with riNg Cavity Experiment DANCE: Development of control system for long-term measurement
Hiroki Fujimoto, Yuka Oshima, Masaki Ando +4
Axion-like particles (ALPs) are pseudo-scalar particles that are candidates for ultralight dark matter. ALPs interact with photons slightly and cause the rotational oscillation of…
Dark matter Axion search with riNg Cavity Experiment DANCE: Current sensitivity
Yuka Oshima, Hiroki Fujimoto, Masaki Ando +5
Dark matter Axion search with riNg Cavity Experiment (DANCE) was proposed. To search for axion-like particles, we aim to detect the rotation and oscillation of optical linear polar…
Reduction of quantum noise using the quantum locking with an optical spring for gravitational wave detectors
Rika Yamada, Yutaro Enomoto, Izumi Watanabe +11
In our previous research, simulation showed that a quantum locking scheme with homodyne detection in sub-cavities is effective in surpassing the quantum noise limit for Deci-hertz…
Quantum noise in a Fabry-Perot interferometer including the influence of diffraction loss of light
Shoki. Iwaguchi, Tomohiro. Ishikawa, Masaki. Ando +10
The DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is designed to detect gravitational waves at frequencies between 0.1 and 10 Hz. In this frequency band, one of…
Improvement of the target sensitivity in DECIGO by optimizing its parameters for quantum noise including the effect of diffraction loss
Tomohiro Ishikawa, Shoki Iwaguchi, Yuta Michimura +10
DECIGO is the future Japanese gravitational wave detector in outer space. We previously set the default design parameters to provide a good target sensitivity to detect the primord…
Demonstration of a dual-pass differential Fabry-Perot interferometer for future interferometric space gravitational wave antennas
Koji Nagano, Hiroki Takeda, Yuta Michimura +2
A dual-pass differential Fabry-Perot interferometer (DPDFPI) is one candidate of the interferometer configurations utilized in future Fabry-Perot type space gravitational wave ante…
Overview of KAGRA : KAGRA science
KAGRA Collaboration, T. Akutsu, M. Ando +240
KAGRA is a newly build gravitational-wave observatory, a laser interferometer with 3 km arm length, located in Kamioka, Gifu, Japan. In this paper in the series of KAGRA-featured a…
Prospects for improving the sensitivity of the cryogenic gravitational wave detector KAGRA
Yuta Michimura, Kentaro Komori, Yutaro Enomoto +18
Upgrades to improve the sensitivity of gravitational wave detectors enable more frequent detections and more precise source parameter estimation. Unlike other advanced interferomet…
Optical trapping of the transversal motion for an optically levitated mirror
Takuya Kawasaki, Naoki Kita, Koji Nagano +4
Optomechanical systems are suitable for elucidating quantum phenomena at the macroscopic scale in the sense of the mass scale. The systems should be well-isolated from the environm…
Current status of space gravitational wave antenna DECIGO and B-DECIGO
Seiji Kawamura, Masaki Ando, Naoki Seto +84
Deci-hertz Interferometer Gravitational Wave Observatory (DECIGO) is the future Japanese space mission with a frequency band of 0.1 Hz to 10 Hz. DECIGO aims at the detection of pri…
Optimization of quantum noise by completing the square of multiple interferometer outputs in quantum locking for gravitational wave detectors
Rika Yamada, Yutaro Enomoto, Atsushi Nishizawa +11
The quantum locking technique, which uses additional short low-loss sub-cavities, is effective in reducing quantum noise in space gravitational wave antenna DECIGO. However, the qu…
Axion Dark Matter Search with Interferometric Gravitational Wave Detectors
Koji Nagano, Ippei Obata, Tomohiro Fujita +1
Axion dark matter differentiates the phase velocities of the circular-polarized photons. In Phys.Rev.Lett. 123 (2019) no.11, 111301, we have proposed a scheme to measure the phase…