Quantum squeezing of light will help scientists make better gravitational wave detectors.
A planned revamp of the Advanced Laser Interferometer Gravitational-Wave Observatory, LIGO, relies on finessing quantum techniques, LIGO scientists announced February 14. That $35 million upgrade could let scientists catch a gravitational wave every day, on average. LIGO’s current tally of 11could be surpassed in a single week, LIGO researchers said in a news conference at the annual meeting of the American Association for the Advancement of Science.
In LIGO, this translates to a give-and-take in the light scientists monitor to detect gravitational waves. At each of the observatory’s two detectors, located in Livingston, La., and Hanford, Wash., laser light bounces back and forth within two 4-kilometer-long arms arranged in an “L”. To determine whether a gravitational wave is passing through, scientistsIn LIGO’s detectors light from a laser bounces back and forth through two arms, traveling as a wave.
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