Quiet Lasers
26 Jan 2008 0:18:06 UTC
Topic 193470
(moderation:
Article on www.physorg.com
Quote:
"Researchers at the Max Planck Institute for Gravitational Physics and Leibniz University of Hanover have produced a laser beam of especially high quality.... results in a reduction in the quantum mechanical intensity fluctuations, known as photon noise, of 90 percent. Using this extremely quite light in gravitational wave detectors can drastically increase their sensitivity."
How much better??
"No, I'm not a scientist... but I did stay at a Holiday Inn Express."
Quiet Lasers
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hello may ı try ıt?
RE: Article on
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Sounds like quite an improvement, in the article it says:
That's not bad since there surely must be lots of BH mergers taking place in the intervening distance.
It also looks fairly easy to implement, adding a second laser and crystal to squeeze the light from the primary laser.
Quantum mechanical entanglement helps to provide a more even distribution of the random bunches of photons in the primary laser beam, it's fascinating. Tullio mentioned entanglement (along with www.qubit.org) recently in a different thread, and it was neat to learn about how difficult number-crunching might be done in a “probabilistic� fashion that takes fewer steps to yield a correct answer than the “deterministic� way of crunching number for number. And a “quantum Fourier transform� can be made with just 2 types of quantum gates, so I can't help but wonder how the LIGO scientists would benefit from an array of QFTs...
@ ilknur: here's a link to the article - The world's lowest noise laser: researchers outsmart quantum physics
Long time, Chipper! and
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Long time, Chipper! and thanks for the response.
It's been awhile since I've looked thru the message boards. I'm in the last 2 weeks of a one year deployment in East Africa. Happy to get my mind re-engaged in mental pursuits that make me sleep easier at night.
I guess that just saying that LIGO can see three time farther into the universe was a bit too simplistic for my curiosity. What might that improvement mean in other terms:
Ability to detect "smoother" pulsars?
Ability to detect other types of GW emitting bodies?
Ability to detect merging binaries earlier?
More??
Cheers,
Glenn
"No, I'm not a scientist... but I did stay at a Holiday Inn Express."