Seth Lloyd - Why is Quantum Gravity Key?

Quantum theory explains the microworld. General relativity, discovered by Einstein, explains gravity and the structure of the universe. The problem is that the two are not friends; they do not get along, they are not compatible. But they must. That’s the task of quantum gravity.

Seth Lloyd is a professor of mechanical engineering at the Massachusetts Institute of Technology. He refers to himself as a “quantum mechanic”.

Closer To Truth, hosted by Robert Lawrence Kuhn and directed by Peter Getzels, presents the world’s greatest thinkers exploring humanity’s deepest questions. Discover fundamental issues of existence. Engage new and diverse ways of thinking. Appreciate intense debates. Share your own opinions. Seek your own answers.

[EddySunMusicProbe]

The explanation about the impossibility of quantizing gravity given by Prof Seth is brilliant and convincing. Thank you for the video!

[VCT]

The way I look at it as a rank amateur is Gravity is also quantized. Every other energy manifestation has a wave particle duality. Light, electrons etc. Now that the Gravitational Waves have been detected, Occam's razor suggests that this energy also has a particle associated with it, Graviton. We may never get to detect it, but maybe we can see it's interactions with other forces close to a massive Gravitational construct... Something like a Black Hole perhaps.

[ResmithSR]

I happen to believe in the String Cheese Theory. And also the General Theory of Beef Jerky.

[Maxwell-mvrx]

If guys keep out phich proceendings his Quantum mecânico is nill evidence phich. What he shows his phich proceendings though experiences? Because he doesnt understand phich proceendings. He blah blah is ant phich experiences.

[gmxmatei]

There is not any form of gravity! All is about electromagnetic field. A unique rule for the entire Universe!... beginning from atoms.

[michelangelope]

I am talking to humanity. You can not say to me you don't understand. Tell me you are not ready for addiction recovery or for peace in the world, but don't torture me saying you don't understand the meaning of "to end all the wars in the world and atheism and religion the discovery that atheism is a logical fallacy has to be news". What could possibly mean that is not what it means? You may think I speak weird and that's because I don't know how to talk or what to say anymore because nothing works. I talk the easiest possible doing my best. I have developed a style of writing to keep you reading til the end or until you understand. Would you memorize and understand the atheist logical fallacy to preserve knowledge useful for future generations? The greatest knowledge of all time is atheism is a logical fallacy that assumes God is the religious idea of the creator of the creation to conclude wrongly no creator exists because a particular idea of God doesn’t exist. I have tried everything doing my best and I failed. I am tired. My loving poems are getting shorter due to mental and physical exhaustion. Let me know when you want what you say you want.

[KlockedQQ]

This guy looks every movie scientist that gets killed by his own creation

[hakiza-technologyltd.]

Hahahaha... for decades, still there zero empirical material evidence... quantum gravity is just fundamentally wrong.

[TerryBollinger]

Seth Lloyd and Robert Lawrence Kuhn, thank you. This is the first time I’ve encountered anyone promoting Einstein’s original pre-Minkowski-conversion view of space and time as networks of clocks and clock-derived rulers.

The 1905 Einstein was adamant about the need to use material clocks to define space and time, and it was only after Minkowski, his old professor, publicly browbeat Einstein into using classical continuum manifold maths that he abandoned lumpy clocks.

As you say, Professor Lloyd, all forms of spacetime, including curved spacetime, instantly become granular with finite, quantum-aware resolution if the only definition you can use for them is fine-grained clocks.

I hope you have written some papers on this. I will certainly take a look.

[missh]

I thought about the same thing when I had to make lava lamps... "water and oil is like string theory and general relativity" except I had to make up what theory could take the place of baking soda and its bubbling effect.

2:24 Isn't it in a location with a vibration quality similar to the tiniest spark of infinite light power, but almost completely invisible to find yet it has a circumference as bold and thick as a crystal fractal cylinder? Also has a type of tiny tiny vibration quality similar to a crystal glass being struck and when obstructing its light beam, the force of its entire length actually disappears far into the deep dark and out through the fabric of time? Cant be sure if it was actually cosmos as it had an opening at the end that seem to look like a tiny full moon. But yes. That would be the correct one. 😊

7:33 i remember the sound travelling experiment as a child. We had to measure the time it took for the sound to reach certain distances. I think about this same thing when I wake up in the morning. How did England do today, are there any things the Americans have set up for todays tasks, will i have to skate over much of it or will i have some elbow in the game today? 😅

8:05 Whats??! Oh come on really...thats our control of time...its not really distance or direction. That string has to have those two things bound to cosmos. Out of our reality and time. Plant a tree today ... how big will it be in 50-100 years. That type of thing. Signed the treaty in 1840, still has full ownership and governace of land... like that 😏

[seanhewitt]

Quantum gravity is temporal compression, which leads to piezo electric discharge, leads to the passage of LIGHT THROUGH TIME...

[sahilnaik]

2:05 string theorist talk about 1^500 different that's a huge number...how will ever find out which one it is?

[gregoryhead]

0 P_max = (c^90909/(G^22727 Newton^22726)); is a quantum Newtonian gravitational equation, for an Einstein-Newton clock. ⏰

[tomazflegar]

And the guy heard about last's year physics nobel prize, huh? Gravity is force that maked something local, right? And local is only true from standpoint of local, just from the observers perspective, not from standpoint of truth. . Interesting specation, local opinion of local mind... One mind...

[cdbaxul]

He didn't answer the question of what implications arise. He only restated the process of quantising clocks. Too bad.

[karllinwood]

Units of gravity? Units of gravity time? Gravity time would become a unit?

[rob.parsnips]

Hard to think about anything but his hair. From one bald guy to another: just shave it. If you wanna peacock, get cooler glasses. Scalp tattoo if you’re really spicy.

[VicMikesvideodiary]

You are all looking up the wrong tree. The secret to the nature of reality was discovered at least as far back as ancient antiquity, and then kept hidden. Plato talks briefly about it with his origin of forms. He doesn't elaborate ON PURPOSE.

[RuneRelic]

String theory. The shotgun approach.
One pellet is bound to hit the target if you have enough pellets.
Just like 'anything can happen if you have enough time'.
Infinite compression is another one with the same MO.

[idegteke]

When explaining your ground-breaking super idea, you must make sure not to differ from the existing explanations too much! Who would want to make all that fragile math from scratch again! We are happy that we succeeded once! Questioning the established is destructive.