8 papers
High-Frequency Thermal Noise in Michelson Interferometers
Daniel Grass, Sander M. Vermeulen, Ian A. O. MacMillan +1
Thermal noise in optics constrains the precision of optical experiments, including Michelson interferometers, optical clocks, and optomechanical sensors. While high-power optical e…
Bidirectional Internal Squeezing for Gravitational-Wave Detectors
Sander M. Vermeulen, Umran Serra Koca, Lee McCuller
We present a bidirectional internal squeezing scheme for gravitational-wave detectors and show that it saturates the lowest known lower bounds on quantum noise from internal optica…
Photon counting readout for detection and inference of gravitational waves from neutron star merger remnants
Ethan Payne, Lee McCuller, Katerina Chatziioannou
Gravitational waves emitted after neutron star binary coalescences and the information they carry about dense matter are a high-priority target for next-generation detectors. Even…
Robust Bilinear-Noise-Optimal Control for Gravitational-Wave Detectors: A Mixed LQG/ Approach
Ian A. O. MacMillan, Lee P. McCuller
At its lowest frequencies, LIGO is limited by noise in its many degrees of freedom of suspended optics, which, in turn, introduce noise in the interferometer through their feedback…
Bayesian frequency estimation at the fundamental quantum limit
James W. Gardner, Tuvia Gefen, Ethan Payne +6
Searching for a weak signal at an unknown frequency is a canonical task in experiments probing fundamental physics such as gravitational-wave observatories and ultra-light dark mat…
LIGO Detector Characterization in the first half of the fourth Observing run
S. Soni, B. K. Berger, D. Davis +232
Progress in gravitational-wave astronomy depends upon having sensitive detectors with good data quality. Since the end of the LIGO-Virgo-KAGRA third Observing run in March 2020, de…