LIGO successfully squeezes quantum states, surpassing Heisenberg’s limits

In the quest to detect gravitational waves, there are a number of obstacles that — no matter how hard we try — continue to stand in our way. Since 2015, with the advent of first the advanced LIGO detectors and then later, the Virgo detector, humanity has <a href="https://bigthink.com/starts-with-a-bang/gravitational-waves-future-astronomy/" rel="noopener ugc nofollow" target="_blank">directly detected gravitational waves</a> from a particular set of sources: merging stellar-mass black holes, merging neutron stars, and (perhaps) merging black hole-neutron star pairs. More recently, a different technique, leveraging pulsar timing, has <a href="https://bigthink.com/starts-with-a-bang/spacetime-rippling-gravitational-waves/" rel="noopener ugc nofollow" target="_blank">discovered a cosmic “hum,”</a> or the sum of all background gravitational wave signals with a much longer timing period. Nevertheless, there are still limits to what we can do with current technology. <a href="https://medium.com/starts-with-a-bang/ligo-successfully-squeezes-quantum-states-surpassing-heisenbergs-limits-b2cd85534169">Website</a>