Buchli, Jonas, Tracey, Brendan, Andric, Tomislav, Wipf, Christopher, Chiu, Yu Him Justin, Lochbrunner, Matthias, Donner, Craig, Adhikari, Rana X., Harms, Jan, Barr, Iain, Hafner, Roland, Huber, Andrea, Abdolmaleki, Abbas, Beattie, Charlie, Betzwieser, Joseph, Cabi, Serkan, Degrave, Jonas, Dong, Yuzhu, Fritz, Leslie, Gupta, Anchal, Groth, Oliver, Huang, Sandy, Norman, Tamara, Openshaw, Hannah, Rollins, Jameson, Thornton, Greg, van den Driessche, George, Wulfmeier, Markus, Kohli, Pushmeet, Riedmiller, Martin, Abbott, R., Abouelfettouh, I., Adhikari, R. X., Ananyeva, A., Appert, S., Apple, S. K., Arai, K., Aritomi, N., Aston, S. M., Ball, M., Ballmer, S. W., Barker, D., Barsotti, L., Berger, B. K., Betzwieser, J., Bhattacharjee, D., Billingsley, G., Biscans, S., Blair, C. D., Bode, N., Bonilla, E., Bossilkov, V., Branch, A., Brooks, A. F., Brown, D. D., Bryant, J., Cahillane, C., Cao, H., Capote, E., Clara, F., Collins, J., Compton, C. M., Cottingham, R., Coyne, D. C., Crouch, R., Csizmazia, J., Cumming, A., Dartez, L. P., Davis, D., Demos, N., Dohmen, E., Driggers, J. C., Dwyer, S. E., Effer, A., Ejlli, A., Etzel, T., Evans, M., Feicht, J., Frey, R., Frischhertz, W., Fritschel, P., Frolov, V. V., Fuentes-Garcia, M., Fulda, P., Fyffe, M., Ganapathy, D., Gateley, B., Gayer, T., Giaime, J. A., Giardina, K. D., Glanzer, J., Goetz, E., Goetz, R., Goodwin-Jones, A. W., Gras, S., Gray, C., Griffith, D., Grote, Hartmut ![]() |
Preview |
PDF
- Accepted Post-Print Version
Download (7MB) | Preview |
Abstract
Improved low-frequency sensitivity of gravitational wave observatories would unlock study of intermediate-mass black hole mergers and binary black hole eccentricity and provide early warnings for multimessenger observations of binary neutron star mergers. Today’s mirror stabilization control injects harmful noise, constituting a major obstacle to sensitivity improvements. We eliminated this noise through Deep Loop Shaping, a reinforcement learning method using frequency domain rewards. We proved our methodology on the LIGO Livingston Observatory (LLO). Our controller reduced control noise in the 10- to 30-hertz band by over 30x and up to 100x in subbands, surpassing the design goal motivated by the quantum limit. These results highlight the potential of Deep Loop Shaping to improve current and future gravitational wave observatories and, more broadly, instrumentation and control systems.
Item Type: | Article |
---|---|
Date Type: | Publication |
Status: | Published |
Schools: | Schools > Physics and Astronomy |
Publisher: | American Association for the Advancement of Science |
ISSN: | 0036-8075 |
Date of First Compliant Deposit: | 2 October 2025 |
Date of Acceptance: | 7 July 2025 |
Last Modified: | 03 Oct 2025 09:01 |
URI: | https://orca.cardiff.ac.uk/id/eprint/181203 |
Actions (repository staff only)
![]() |
Edit Item |