Speaker
Description
Squeezed light has become a baseline quantum technology in gravitational-wave detectors, delivering routine quantum-noise reduction and driving the success of recent astrophysical observations. Next-generation observatories, including the Einstein Telescope, are being designed with squeezed-light operation as a core part of the sensitivity concept: key subsystems are optimized for compatibility with quantum-noise suppression. This drives requirements such as ultra-low-loss optics and readout chains, multi-kilometre-scale filter cavities for frequency-dependent squeezing, and optical layouts and control strategies that minimize loss, phase noise, scattered light, and other imperfections. In this talk, I will give an overview of squeezed-light technology, recap the story of its success in current detectors, and outline the opportunities and the practical challenges for implementing squeezing in the next-generation gravitational-wave observatories.
