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| Squeezed laser will bring gravitational waves to the light of day Posted: 11 Sep 2011 11:52 AM PDT Measuring at the limits of the laws of nature -- this is the challenge which researchers repeatedly take up in their search for gravitational waves. The interferometers they use here measure with such sensitivity that a particular quantum phenomenon of light -- shot noise -- limits the measuring accuracy. With the "squeezed light" method, scientists in Germany likewise use quantum physics in a countermove in order to remove the interfering effect. The new type of laser light improves the measuring accuracy of the gravitational wave detector GEO600 by around 50 percent and thus increases its effective sensitivity. This is the first time this technology has been used outside of a test laboratory anywhere in the world.  |
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