Quantum Gravity

While there are many challenges facing modern particle physics, perhaps the ultimate one (and certainly among the most difficult) is to describe the nature of gravity in the quantum realm.  Despite a century of effort, scientists have had only the most cursory of success.  In this video, Fermilab’s Dr. Don Lincoln talks about the idea of quantum gravity and sketches out the need for this difficult advance.

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[joaovitormendes]

I really love this channel, it's so complete, even for a non physicists

[parabellum]

*_Plot Twist: The universe is a Graviton._*

[gizatsby]

5:29
"so, getting back to the more basic idea of quantum gravity..."

[kuonirat]

"And by successful, I mean still possible" - science :)

[GetMeThere]

I have to say, this channel (this guy, sorry, I'd seen your name, but I don't recall it) does a better job with comprehensible explanations of arcane topics in physics than any other other channel or video on youtube. This is stuff that LOTS of people want to know about, and, more or less, you are the only one providing explanations that are really meaningful to scientifically literate non-physicists. Thanks for all your videos.

[jeffreyharrison]

I like when they were cutting paper into a plank length and just gave up at about 1 inch.

[phillywonkaCa]

This is probably one of the best science explanations on any topic I've ever heard - and I've heard a lot!
It well presented and and well organized. Bravo!
Thanks

[TheKakashims]

I really liked the comment "don't send me any anti-relativity email", those people just drove me crazy this week!! Thank you Dr.Linkoln for this superb series <3

[francisagostine]

I just love the way you explain it so clearly, even though i watched this video a lil bit drunk but i got everything you said, you have got yourself a subscriber.

[skyak]

I am an engineer. It just amazes me how focused physicists are to include gravity to the standard model despite the fact it can't possibly have any relevant effect in any place we can reach. If you ever do find how to include gravity I have Dibbs to be the first engineer to say to you "that term is insignificant so I am dropping it from the equation."

[Shuzosh]

"Gravity is the weakest force"

Black hole: Hold my beer.

[fazergazer]

I’m quite fond of this channel. So matter-of-fact about the non-intuitive, and so mind-blowing about the things we take for granted!

[constpegasus]

Again, I thank you for these videos. I learned some stuff here that adds a lot of context to what I have been thinking about for a while. Keep up the good work and keep these videos coming please. if I was aware of some things a long time ago, then physics would have been my profession now.

[lrca]

He's able to explain complex matters in an interesting way and in a way that any person can understand.

[richardpalmer]

Thank you, Dr. Lincoln, for your most cogent insight. It will greatly aid in integrating all this knowledge into a comprehensive understanding of what is and is not known in physics.

[neilk.astrophotography]

The fact (or seemingly) that we can ponder these questions upon this oblate spheroid called Earth at this particular point in something called time is really something to behold .Thank you for your time in making your excellent productions !

[fabiocaetanofigueiredo]

Dr. Lincoln, you are an awesome teacher - because you clearly understand things first, then you teach them 👏

[sallylauper]

Hey mister scientist, I have a question: Um, how does like... how does reality work and stuff?

[damienasmodeus]

I have a suggestion of what quantum theory could be.
It assumes that multiverse interpretation of quantum mechanics is true and there is no such thing as collapse of wave function.
Instead collapse of wave function is simply entanglement of observer with the particle, that's why from his point of view it looks like wave function collapsed, but it didn't.
If this is true then we can calculate gravitational influence of a particle as an bending of spacetime in all quantum multiverses simultaneously.
This theory would also explain existence of dark matter, as an influence of particles from other universes on our universe.

This theory is also experimentally testable.
Here is experiment to determine if it is true:
Put 1 heavy object whose gravitational influence you can detect into an empty space. Put device onto the object that would detect quantum state of spin of a single particle.
Make the wave function of the particle collapse. If the spin goes up, device will push the heavy object with some force to the left. If the spin goes down, device will push the heavy object with some force to the right. According to theory, what we did here is that we entangled the heavy object with the quantum state of the spin of the particle and if that theory is true we should be able to detect that the heavy object suddenly have 50% gravitational influence and at the same time there would be created bubble of dark matter with the rest of 50% gravitational influence of the heavy object going in opposite direction as the object, because the dark matter would be simply the same object in another universe.

[grindupBaker]

My body has gained 10**89 Gravitons over the last 5 years since I turned 68. I'm willing to donate my body to quantum physics research on that (not until after I'm dead though).