Quantum Entanglement Explained

Quantum Entanglement is perhaps the most mysterious of the quantum effects and in this video, we'll talk about what it is, how it works, and what we know and don't know about it.

Enjoy!

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[RespectYourIntellect]

Hey guys! I will likely be taking a little bit of a summer break here and take some time to go play outside a bit. I'll be back here continuing this Quantum Effects series right after. See you on the next one and I hope you guys in the Northern hemisphere are enjoying your summer!

[DaNyAaLcEc]

This is one of the most helpful videos I've ever seen

[stuckinflorida]

I have entangled particles in my brain now, the first time that I seen the double slit experiment many years ago I was amazed and baffled at the same time, not much has changed 😔. I do appreciate you breaking it down as best possible, it’s not an easy subject and we still have much to learn.
Thanks for everything you do for the science community.
Keep up the great work.

[meyanabarnhart]

So, so useful! Thank you. Your explanation is superb and makes it seem so simple!

[pairoa]

John, you are by far the only that to got me closer to understanding the double slit experiment and basics of entanglement, great job bringing hard subjects to more simple terms!

[CURTIS-WCER]

This is a great video, John. I've often struggled to understand how quantum entanglement is possible.

[naturemc]

Super Explanation. I am so late but it's great finding. Thanks 🌹

[adventureswithdogs]

Dean Koontz, in his Frankenstein series, touches on a part of quantum theory. The lead character, Deucalion, has the ability to transport himself instantly to anywhere by going back in time to the creation of the universe, and simply taking one step to wherever he wanted to go.
"The more we learn, the more we have yet to learn"!

[robertreed]

Sorry, I'm new at this. Firstly, if all of our universe were compressed tightly at the big bang then should not all particles already be entangled with each other? Could, then, entanglement be the explanation for gravity? Then as our brane expands would entanglement(gravity?) weaken between separating masses, explaining dark energy?
One other point. If we actually, exist in 4 spatial dimensions would it be possible that two entangled particles separated by a large 3D distance, be much closer to each other along the shortest
4D path between them, allowing, from our perspective, a faster than light signal response?

[binnemans]

Thank you for posting Jon, again very informative and correct information. Boom, 2nd, lol. :-)

[straightedgerc]

A choice (the activity of the human mind in philosophy) such as whether or not to consciously look at entangled information is identical to the subjective experience of making a choice (the activity of the human mind in physics) violating Localism as the choice is instantly observed elsewhere.  So, when making a choice in either philosophy or Quantum physics, the subjective experience (human mind) does not occur locally (proving an idea called Atman in Hindu).

[arctic_haze]

Your explanation follows very much the Copenhagen interpretation. I prefer non-local hidden variables (Bell's theorem rules out only the local ones), that is I'm a realist from the Smolin school. In fact I like very much the recent idea that space-time itself comes from entanglement. This would mean that entanglement is much more fundamental than distance (or that space is emergent in the physics lingo). Also that would mean there is no information transferred: the entangled particles are simply one quantum system and distance is irrelevant.

[shivangprasad]

it docent quantise, a lot of things happen in the same time .right?

[muhanadtaifour]

Nice lecture
But I have few point I think you have misunderstanding

Casuality will be violated when things happens for no reason not just because things happen simultaneously or even if result happened before cause

[sysadmin]

But if it’s a probability wave how do electrons overlap and cause this entanglement? Isn’t the wave just a probability wave of where the electron could be at any given time? Not the actual locations of the electron?

[kickass]

If you have a source that creates two entangled electrons in a quantum state, and you measure only one electron discovering it has spin down, thereby deducing that the other electron now has spin up. You don't measure the other electron yet, but instead, change the spin of the first electron, using a magnetic field, to spin up. You measure the second electron and, does it have spin up like deduced, or down due to entanglement? Or, am i completely wrong, and the wave function collapse, due to the first measurement, means that they are no longer entangled?

[Punchy]

Two gloves in two boxes, but unlabeled, eh? What is it with scientists and their interest in forbidden boxes of mystery?

[alwaysannoyed]

You don't need the distracting and pointless music in the background. It's offputting and makes it hard to concentrate on the message.

[nehath]

im a physics noob so idk if this is a stupid question but what would happen if u split one of two photons which are entangled with the crystal he talked about in the video would that negate the entanglement bcuz the original photon doesnt exist anymore or would the non splitted photon be entangled with the two half energy photons?