New Experiment Could Settle 100 Years-Old Debate about Quantum Tunneling

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Quantum Tunnelling is a fascinating process in which a particle goes through a barrier faster than the speed of light. At least that’s what some physicists think. Others say this is just a wrong interpretation of what is really going on. This debate has been going on for a century, but a new experiment could finally end the debate once and for all. Let’s have a look.

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#science #sciencenews #physics

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Kudos to the choreographer of the synchronized waving of your hands.

jeffryborror

El Chapo is waiting patiently for this new tunnel tech.

ChadLangford-US

I predict that the results of this hypothetical experiment will be EACTLY the result which prevents us from resolving the disagreement and thus preserves the ambiguity.

kennethferland

🙌"The waves wave..."🤚🖐, if Dr. Sabine is demonstrating difficult physical phenomenons by gesticulating with her hands, it gets really hilarious. Great episode again.🤙👈😊

Thomas-gk

We demand rigidly defined areas of doubt and uncertainty!

kpaasial

by the way: for the average joes the most common real-world example of tunneling are SD-Card and USB-Sticks.
No Flash memory works without hte tunnel effect, because charge is brought onto a transistor gate with high voltage which is actually isolated, so normally no charge should be able to get or leave form there. But with a high enough programming voltage, you can tunnel charge onto the gate (or pull it out in reverse).
Everyone uses this, almost no one is aware.

markusdd

Sabine, It would be great to see you interview scientists doing work you find interesting.

blingpup

Another thing to consider is the speed which information moves at when the possibility arises that the particles "going through" may not actually be the same particles but rather displaced particles that were released as the others were absorbed into the medium that was the barrier.

kevinricherson

I think it was the book, "The Men Who Stare at Goats" that chronicled a time when certain military folk would run full speed into a wall, hoping to get lucky and pass through it unharmed. I suppose there are still people who do things like that after learning a little science.

curtisblake

Very interesting. I hope we will be kept updated by this channel when the result will be known.

jonathanlamarre

Tunneling diodes work because tunneling electrons. A good way to say it is Schrodinger wave equations define the probability of the existence of the particle throughout a volume. There is a probability the location exists on the other side of the barrier. When this happens, the wave continues on the other side of the barrier, even though it never had enough energy to jump the barrier. It’s like a pole vaulter who does not have enough energy to raise his full weight above the barrier. He contorts his body so his feet are above the barrier while the rest is below the barrier. Then the hips are above the barrier while feet and head are below the barrier height. This gets the whole body over the barrier even though it did not have enough energy to be over the barrier.

douginorlando

This sounds wonderful! I’m glad someone came up with a way to actually test this. Thanks for the report!

TallinuTV

Phase velocity (what their interferometer measures) can be greater than the speed of light, while group velocity (actual information) is still under the speed of light, thus still not violating relativity. Photons were already demonstrated to be "faster than light" in that sense years ago.

MrWorshipMe

This is a very nice explanation. I appreciate that you do not say that the debate about superluminal tunneling is settled like the mainstream wants us to believe. This is what I was told in university but I never believed it.

kilianklaiber