This is so cool.
There's been some discussion of whether this is the Meissner Effect, on this item and also an earlier rec (hunch.com/item/hn_3909381/quantum-levitation/) and I think the consensus is that it's actually something different. There are discussions on the youtube pages as well. What do you think? Meissner Effect of course is very cool as well ;)
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This is so cool.
The Meissner effect causes the magnetic field to be expelled from the interior of the superconductor. In order for the superconductor to move toward or away from the magnetic track, it would have to cross field lines and thus let a magnetic field into its interior. Since this cannot happen, it will hover in place.
I think the difference between this and standard Meissner Effect demos is that in this they can arbitrarily position the floating superconductor and it stays in place.
Supposedly has to do with small dense field lines "quantum flux tubes" through fixed parts of the object. Here's a (probably oversimplified) description that discusses the difference: www.technewsworld.com/story/73556.html
One of the best superconductor demos I’ve ever seen! It’s showing off a “quantum trapping” technique that allows the superconductor to lock into a position.
The editing and music make me laugh—especially as @hrldcpr pointed out to me that the super conductor looks like a steam engine with nitrogen gases shooting out of it.
most science majors get to do this in lab, and it's dece, but on this scale it's awesome.
oddly, the guy in the video calls this "quantum levitation" and talks about "locking", which i'm pretty sure is the wrong way to describe it. anyone care to expound?
i can't find any literature referencing "magnetic levitation" as "quantum levitation", but oh well, i guess it sounds more viral (OMG VIRAL, LIKE BUTTON, DERP).
for anyone interested, some more info: en.wikipedia.org/wiki/Meissner_effect
en.wikipedia.org/wiki/Flux_pinning = "locking"
regardless, this is the best demo of this effect i have seen.
such a cool phenomenon.
i haven't read enough to say why, but I think that this is indeed different from the Meissner Effect so they may be justified throwing "quantum" in there.
Quantum Locking is what happens when you expose a super-cooled superconductor to a magnetic field. The super-cooled semiconductor allows the magnetic field thru only at certain weak points called Flux Tubes. In this way, the superconductor material can be 'locked' into a particular position in the magetic field.
FYI - I posted a link in my re-recommendation that shows a larger experiment using quantum-locking.