activity
20222025
most citedFirst-step experiment in developing optical-spring quantum locking for DECIGO: sensitivity optimization for simulated quantum noise by completing the square

6 citations · 9 across the 9 of their papers we have counts for

collaborators

9 papers

gr-qc2025★ 1 cited

Quantum Noise Reduction in the Space-based Gravitational Wave Antenna DECIGO Using Optical Springs and Homodyne Detection scheme

Kenji Tsuji, Tomohiro Ishikawa, Kentaro Komori +6

The DECi-hertz Interferometer Gravitational-wave Observatory (DECIGO) is a planned space-based, next-generation gravitational wave detector aimed at observing primordial gravitatio…

gr-qc2025

Jiggled interferometer: Ground-based gravitational wave detector using rapidly-repeated free-falling test masses

Shoki Iwaguchi, Bin Wu, Kurumi Umemura +10

We propose the Jiggled Interferometer (JIGI), a novel ground-based gravitational wave detector employing low-frequency noise mitigation similar to that of space-based detectors. Us…

physics.ins-det2025

Proof-of-Principle Experiment on a Displacement-Noise-Free Neutron Interferometer for Gravitational Wave Detection

Shoki Iwaguchi, Takuhiro Fujiie, Taro Nambu +13

The displacement-noise-free interferometer (DFI) is designed to eliminate all displacement-induced noise while retaining sensitivity to gravitational wave (GW) signals. Ground-base…

physics.optics2025

Quantum Noise from Vacuum Field Injection in Optical Cavities with Diffraction-related Loss

Kurumi Umemura, Tomohiro Ishikawa, Kenji Tsuji +6

The space-based gravitational wave detector DECIGO is designed to observe primordial gravitational waves with 1,000 km Fabry-Perot cavities. Its sensitivity is limited by quantum n…

gr-qc2024

Significance of Fabry-Perot cavities for space gravitational wave antenna DECIGO

Kenji Tsuji, Tomohiro Ishikawa, Kurumi Umemura +5

The future Japanese project for the detection of gravitational waves in space is planned as DECIGO. To achieve various scientific missions, including the verification of cosmic inf…

gr-qc2023

Sagnac-type neutron displacement-noise-free interferometeric gravitational-wave detector

Yuki Kawasaki, Shoki Iwaguchi, Tomohiro Ishikawa +13

The detection of low-frequency gravitational waves on Earth requires the reduction of displacement noise, which dominates the low-frequency band. One method to cancel test mass dis…

gr-qc2023

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…

gr-qc2022★ 6 cited

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…

gr-qc2022★ 2 cited

Displacement-noise-free interferometeric gravitational-wave detector using unidirectional neutrons with four speeds

Shoki Iwaguchi, Atsushi Nishizawa, Yanbei Chen +11

For further gravitational wave (GW) detections, it is significant to invent a technique to reduce all kinds of mirror displacement noise dominant at low frequencies for ground-base…