Addressing rotational motion on gravitational waves detectors
arXiv:2607.26430
The paper reviews how Earth's rotational seismic motion limits the low‑frequency sensitivity of ground‑based gravitational‑wave detectors and surveys recent advances in sensing and control techniques to mitigate this effect.
Abstract
The rotational components of Earth's seismic motion are one of the major contributions to limit the sensitivity of terrestrial gravitational-wave detectors at frequencies below 10 Hz. The fundamental challenges lie in understanding the angular degrees of freedom of seismic motion and how they can be accurately measured. These are both crucial steps for developing an adequate control system to suppress seismic motion and maintaining resonance in the detector cavities. This review shows why the rotational ground motion limits the detector's sensitivity and gives an overview of the technological achievements of the last decade on both the sensing and control systems sides. Perspectives on future developments in the field are also briefly illustrated.
19 pages, 19 figures