Australian National University | 2019 Oct 31
Scientists at The Australian National University (ANU) have found a way to better detect all collisions of stellar-mass black holes in the Universe.
Stellar-mass black holes are formed by the gravitational collapse of a star. Their collisions are some of the most violent events in the universe, creating gravitational waves or ripples in space-time.
These ripples are miniscule and detected using laser interferometers. Until now, many signals have been drowned out by so-called quantum noise on the laser light pushing the mirrors of the laser interferometer around - making the measurements fuzzy or imprecise.
The researchers' new method, called 'squeezing', dampens quantum noise making measurements more precise, with the findings published in Nature Photonics.
The breakthrough will be critical for next-generation detectors, which are expected to come online within the next 20 years. ...
Broadband Reduction of Quantum Radiation Pressure Noise via Squeezed Light Injection ~ Min Jet Yap et al