Wednesday, October 25, 2023

LIGO surpasses the quantum limit

Amazing stuff!

"... At the heart of LIGO’s success is its ability to measure the stretching and squeezing of the fabric of space-time on scales 10 thousand trillion times smaller than a human hair.
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. ...
The results also have ramifications for future quantum technologies such as quantum computers and other microelectronics as well as for fundamental physics experiments. ..."

LIGO surpasses the quantum limit | MIT News | Massachusetts Institute of Technology Researchers achieve a landmark in quantum squeezing.

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