Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article 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.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1126/science.adw1291 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Improving cosmological reach of a gravitational wave observatory using Deep Loop Shaping.
Science
September 2025
LIGO Laboratory, California Institute of Technology, Pasadena, CA, USA.
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.
View Article and Find Full Text PDFDeeply Nonlinear Magnonic Directional Coupler.
Nano Lett
August 2025
School of Physics, Hubei Key Laboratory of Gravitation and Quantum Physics, Institute for Quantum Science and Engineering, Huazhong University of Science and Technology, 430074 Wuhan, China.
Dipolar coupling between closely spaced magnetic waveguides enables magnonic directional couplers serving as signal combiners, power splitters, demultiplexers, and more. The wavelength-dependent coupling, combined with the weak nonlinear variation of spin-wave wavelength at constant frequency, introduces power-dependent characteristics of directional couplers. This property has been utilized in magnonic logic elements and other applications.
View Article and Find Full Text PDFComplete Gravitational-Wave Spectrum of the Sun.
Phys Rev Lett
August 2025
Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany.
The high-temperature plasma in the solar interior generates stochastic gravitational waves (GWs). Owing to its significance as the primary source of high-frequency GWs in the Solar System, we reexamine this phenomenon by highlighting some physical processes, including the contribution of macroscopic hydrodynamic fluctuations. Our analysis builds upon several studies of axion emission from the Sun, particularly in relation to the treatment of plasma effects.
View Article and Find Full Text PDFSearch for Higher Harmonic Signals from Close White Dwarf Binaries in the mHz Band.
Phys Rev Lett
August 2025
Kyoto University, Department of Physics, Kyoto 606-8502, Japan.
Space-based gravitational wave (GW) detectors, such as LISA, are expected to detect thousands of Galactic close white dwarf binaries emitting nearly monochromatic GWs. In this study, we demonstrate that LISA is reasonably likely to detect higher harmonic GW signals, particularly the (l,|m|)=(3,3) mode, from a limited sample of nearby close white dwarf binaries, even with small orbital velocities v/c of order 10^{-3}. The amplitudes of these post-Newtonian modes provide robust probes of mass asymmetry in such systems, making them valuable observational targets, especially in mass-transferring binaries.
View Article and Find Full Text PDFA cryogenic chamber setup for superfluid helium experiments with optical fiber and electrical access.
Rev Sci Instrum
August 2025
Kavli Institute of Nanoscience, Department of Quantum Nanoscience, Delft University of Technology, 2628CJ Delft, The Netherlands.
Superfluid helium is a prototypical quantum liquid. As such, it has been a prominent platform for the study of quantum many body physics. More recently, the outstanding mechanical and optical properties of superfluid helium, such as low mechanical dissipation and low optical absorption, have positioned superfluid helium as a promising material platform in applications ranging from dark matter and gravitational wave detection to quantum computation.
View Article and Find Full Text PDF