Understanding Quantum Mechanics #8: The Tunnel Effect

#physics #science #education

0:00 Intro
0:35 Quantum Mechanics Recap
2:07 Free particle, classical vs quantum
3:22 Tunneling, classical vs quantum
6:32 The weird part
8:20 Sponsor Message

[alexChook]

This is a fantastic presentation Sabine! I studied quantum mechanics as part of my physics undergraduate degree and I love how you are helping to de-mistify some of these concepts which are labelled as 'weird' by most people. Thanks for your contributions to scientific knowledge.

[prydin]

You’re doing something that few educators bother to do: You actually solve the equation! Most of the time we are just supposed to look at an abstract equation without any connection to something tangible. This made all the difference in the world. Thanks Sabine!

[hylianknight]

"Quantum tunneling isnt that weird... except for this, whoops" i love it

[m_jackson]

Thank you. The way you convey concepts is the most understandable I've yet seen.

[dekenba]

Just superb. Sabine has a real passion for physics, she fully understands what she is explaining, she has a dry sense of humour, she doesn't mind being controversial when it's necessary and she has one of the world's largest wardrobes.

[manucitomx]

Thank you, Dr. you’re surely one of the best science explainers of this century. I look forward to your videos every week.

[randywa]

I love how she explains stuff. It’s much more simple but specific and makes a lot more sense than most science explanations.

[nicolasduguay]

Increadible how you, Sabine, are able to clarify decades of quantum mystisism in a video shorter than 10 minutes!
This schrodinger equation visual representation is absolute gold.
I'm also so glad to have learn what is the current scientific quantum struggle and challenge!
Thank you Sabine, please go on in your very constructive educative journey!

[LowellBoggs]

absolutely outstanding video. this is really high quality education. thank you so much.

[iphotobomb]

One of the best visualisations of the probability wave I've seen.
Love to see explanation of other aspects of the wave seen here (eg those many peaks when bouncing) or some other examples

[baganatube]

Every video of yours reminds me of how lucky I am to have come across your channel some time ago. I've seen a few great science popularization channels, but none has explained this concept so intuitively.

[eulogionavarro]

If I had had this videos back in the 90s... oh dear! Thank you so much for this Sabine!!!!

[MCsCreations]

Fantastic, Sabine! Thanks a lot! 😃
Stay safe there with your family! 🖖😊

[arctic_haze]

Sabine, you have achieved the look of an advanced civilization being from the original Star Trek. Even including the background. Perfect! The same is true about the science content, as always. Thanks!

[dennisbauer]

You are absolutely extraordinary at making me, and no doubt thousands of others, understand, and at least get a concept of Quantum Mechanics. Thank you is never enough, but thank you so much.

[BardaKWolfgangTheDrug]

I watch tons of physics and math videos and I've never seen the part with faster than light tunneling :o Thank you!

[swarnendudas]

The best channel ever to have a crystal clear understanding of the fundamentals of Quantum Mechanics. ❤️❤️❤️❤️❤️

[luudest]

2:37 thank you for visualizing the developement of the propability distribution over time. It‘s the best visiulation and explanation about this behaviour on youtube that I‘ve seen!!
Historical question: When was this developement of the probability over time first described?

[gretalaube]

I am an old retired EE, and just got some tunnel diodes for fun. I started to play with them, and noticed that the thresholds are really "noisy". This video is a great explanation, but I had to go back and watch all the previous ones, too.

Each device and oscillator circuit has different thresholds, and is "fussy" and unpredictable. Now, it makes some sense. Sometimes they oscillate one way, and other times, they go to some completely different loci. ...amusing little fellows! No wonder! Thanks for your explanation.

[paulthompson]

Sabine, that was well done in the short amount of time you had to explain it in. In a longer video, I would emphasize how the "wall" does not completely fill up the space that the particle may pass through. As a result, the tunnel effect can simply be interpreted as the particle making its way through the "gaps" in the "wall".