3 ms·
Not a formal definition, but noise is simply the undesirable parts of the output of any information processing device, be it a sensor, an amplifier, or a transm
by samus 3y ago
Not a formal definition, but noise is simply the undesirable parts of the output of any information processing device, be it a sensor, an amplifier, or a transmission medium. But on Earth it's simply not practical as such. Gravitational waves observatories are used to detect events such as neutron star or black hole mergers that are otherwise unobservable, but they require an insane level of precision to be detected.
- westurner 3y agoAre there yet any instruments better than LIGO at a lagrangian point outside Earth's atmosphere and the Van Allen radiation belt?
- _Microft 3y agoNo, there’s nothing yet. I think you‘re thinking about (e)LISA btw.
- _Microft 3y agoHere is a link for that: https://en.wikipedia.org/wiki/Laser_Interferometer_Space_Antenna https://en.wikipedia.org/wiki/Laser_Interferometer_Space_Ant...
- westurner 3y agoLISA: Laser Interferometer Space Antenna: https://en.wikipedia.org/wiki/Laser_Interferometer_Space_Antenna https://en.wikipedia.org/wiki/Laser_Interferometer_Space_Ant... : > LISA would be the first dedicated space-based gravitational-wave observatory. It aims to measure gravitational waves directly by using laser interferometry. The LISA concept has a constellation of three spacecraft arranged in an equilateral triangle with sides 2.5 million kilometres long, flying along an Earth-like heliocentric orbit. The distance between the satellites is precisely monitored to detect a passing gravitational wave.[2] It also says the ESA LISA projected launch date is in year 2037. Could 3 or 4 cubesats per cluster solve for space-based gravitational wave observation? CubeSat: https://en.wikipedia.org/wiki/CubeSat https://en.wikipedia.org/wiki/CubeSat Li-Fi: https://en.wikipedia.org/wiki/Li-Fi https://en.wikipedia.org/wiki/Li-Fi Could the gravitational wave sensors be mounted on Starlink or OneWeb ULEO Ultra Low Earth Orbit satellites with a 5 year lifecycle? (Also, how sealed and shielded do consumer radio telescopes like Unistellar's eVscope and eQuinox need to be to last a few years in microgravity? Maybe mando blackout noise.) What is SOTA State of the Art in is it "matter-wave interferometry"? /? matter-wave interferometry wikipedia: https://www.google.com/search?q=matter-wave+interferometry+wikipedia https://www.google.com/search?q=matter-wave+interferometry+w... /? matter-wave interferometry: https://www.google.com/search?q=matter-wave+interferometry https://www.google.com/search?q=matter-wave+interferometry Can low-cost lasers and Rdyberg atoms e.g. Rydberg Technology solve for [space-based] matter-wave interferometry? /? from:me LIGO https://twitter.com/search?q=from%3A%40westurner%20ligo https://twitter.com/search?q=from%3A%40westurner%20ligo : - "Massive Black Holes Shown to Act Like Quantum Particles" (2022) https://www.quantamagazine.org/massive-black-holes-shown-to-act-like-quantum-particles-20220329/ https://www.quantamagazine.org/massive-black-holes-shown-to-... : > Physicists are using quantum math to understand what happens when black holes collide. In a surprise, they’ve shown that a single particle can describe a collision’s entire gravitational wave. - GitHub topic: gravitational-waves: https://github.com/topics/gravitational-waves https://github.com/topics/gravitational-waves
- westurner 3y agoFurther notes regarding Superfluid Quantum Gravity (instead of dark energy): https://news.ycombinator.com/item?id=36258299 https://news.ycombinator.com/item?id=36258299