Posted on 03/02/2021 7:47:31 AM PST by BenLurkin
The researchers' lab-grown black hole was made of a flowing gas of approximately 8,000 rubidium atoms cooled to nearly absolute zero and held in place by a laser beam. They created a mysterious state of matter, known as a Bose-Einstein Condensate (BEC), which allows thousands of atoms to act together in unison as though they were a single atom.
Using a second laser beam, the team created a cliff of potential energy, which caused the gas to flow like water rushing down a waterfall, thereby creating an event horizon where one half of the gas was flowing faster than the speed of sound, the other half slower. In this experiment, the team was looking for pairs of phonons, or quantum sounds waves, instead of pairs of photons, spontaneously forming in the gas.
A phonon on the slower half could travel against the flow of gas, away from the cliff, while the phonon on the faster half became trapped by the speed of the supersonic flowing gas...
Once they found these phonon pairs, the researchers had to confirm whether they were correlated and if the Hawking radiation remained constant over time (if it was stationary). That process was tricky because every time they took a picture of their black hole, it was destroyed by the heat created in the process. So the team repeated their experiment 97,000 times, taking more than 124 days of continuous measurements in order to find the correlations. In the end, their patience paid off.
(Excerpt) Read more at livescience.com ...
James Clerk Maxwell was a scientist that used analogies to approach problems he didn’t understand using similar behavior in things he did. He explained magnetic and electric flow using the mathematics of fluid flows and he was right even though they had no idea what was actually “flowing” (electrons).
In this case the analogy is interesting but not really that informative. The problem is they are using the behavior of actual atoms (real) to explain the proposed behavior of virtual particles at the boundary of a black hole (not real). Quantum field scientists understand that virtual particles are fictions used in Feynman diagrams to make the math easier and don’t exist. Hawking understood this as well and the idea that virtual particles would “fall into” a black hole would make him laugh. Hawking radiation is a function of entanglement entropy at the boundary of a region of space and not some fairy tale of virtual particle splitting.
Wake me up when they actually find dark matter.
“Has anyone seen Dr Klinesmith? He was here a moment ago. I just found his glasses on the floor.”
This passes as science today?
Your perspective is ‘heavysided’. Maxwell’s equations were brilliant insights.
Cool... This one’s all sciency and stuff.
Since when do they need real Biden votes to pull off a win? Hmmmm?
It does, but not all math is physics.
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