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Sciency stuff-Quantum tunneling...

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Sciency stuff-Quantum tunneling...
Fri Aug 07, 2020 11:33 am
  • Physicists watch quantum particles tunnel through solid barriers. Here's what they found.

    The quantum world is a pretty wild one, where the seemingly impossible happens all the time: Teensy objects separated by miles are tied to one another, and particles can even be in two places at once. But one of the most perplexing quantum superpowers is the movement of particles through seemingly impenetrable barriers.

    Now, a team of physicists has devised a simple way to measure the duration of this bizarre phenomenon, called quantum tunneling. And they figured out how long the tunneling takes from start to finish — from the moment a particle enters the barrier, tunnels through and comes out the other side, they reported online July 22 in the journal Nature.

    Quantum tunneling is a phenomenon where an atom or a subatomic particle can appear on the opposite side of a barrier that should be impossible for the particle to penetrate. It's as if you were walking and encountered a 10-foot-tall (3 meters) wall extending as far as the eye can see. Without a ladder or Spider-man climbing skills, the wall would make it impossible for you to continue.

    Related: The 18 biggest unsolved mysteries in physics

    However, in the quantum world, it is rare, but possible, for an atom or electron to simply "appear" on the other side, as if a tunnel had been dug through the wall. "Quantum tunneling is one of the most puzzling of quantum phenomena," said study co-author Aephraim Steinberg, co-director of the Quantum Information Science Program at Canadian Institute for Advanced Research. "And it is fantastic that we're now able to actually study it in this way." ... sured.html
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Re: Sciency stuff-Quantum tunneling...
Tue Aug 11, 2020 4:08 am
  • Fascinating, Sutz - thank you! I always read and enjoy your Sciency Stuff posts.

    Have to ask my nephew about this some time - he's a lecturer in quantum physics at Cambridge University (did his PhD at Oxford as a Rhodes Scholar).
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