[ExI] LIGO surpasses the quantum limit

BillK pharos at gmail.com
Mon Oct 23 21:46:21 UTC 2023

Researchers achieve a landmark in quantum squeezing.
Whitney Clavin      Publication Date: October 23, 2023

As incomprehensibly small as these measurements are, LIGO’s precision
has continued to be limited by the laws of quantum physics. At very
tiny, subatomic scales, empty space is filled with a faint crackling
of quantum noise, which interferes with LIGO's measurements and
restricts how sensitive the observatory can be. Now, writing in the
journal Physical Review X, LIGO researchers report a significant
advance in a quantum technology called “squeezing” that allows them to
skirt around this limit and measure undulations in space-time across
the entire range of gravitational frequencies detected by LIGO.

Amazing science!


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