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. Using rapidly-repeated free-fall test masses, JIGI eliminates seismic and suspension thermal noise during free fall. Compared to the Juggled Interferometer, it offers improved angular stability and avoids tracking lasers. We analyze detrending -- a required step to remove actuation-induced noise -- and show sensitivity gains of about four orders of magnitude in the 0.1-0.3 Hz band, relative to seismic and suspension noise extrapolated from the Cosmic Explorer.
@article{arxiv.2509.12095,
title = {Jiggled interferometer: Ground-based gravitational wave detector using rapidly-repeated free-falling test masses},
author = {Shoki Iwaguchi and Bin Wu and Kurumi Umemura and Tomohiro Ishikawa and Kenji Tsuji and Ryota Nishimura and Yuta Michimura and Yutaro Enomoto and Soichiro Morisaki and Yoichi Aso and Tomotada Akutsu and Keiko Kokeyama and Seiji Kawamura},
journal= {arXiv preprint arXiv:2509.12095},
year = {2026}
}