Seth Lloyd - Why is Quantum Gravity So Significant?

Quantum theory explains how particles and fields work. General relativity, discovered by Einstein, explains how gravity generates the structure of the universe. But the two great theories of physics and cosmology are not compatible. But this is impossible because both describe reality. Only a solution to quantum gravity can solve the huge problem.



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


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[soip]

There was no mention of gravity. Perhaps the name was meant to be “why is quantum computing so significant”?

[GiI]

I enjoyed the video, as I always do but I wanted to see something about quantum gravity.

[GreenLight]

can we have a collage of pysicists/philosphers with funky hair lol

[rv]

He has quantum hair: it's there, but at the same time it's _not_ there

[RILEYLEIFSON_UTAH]

I guess I missed the part where they discuss the importance of quantum gravity.

[KT-djiy]

Other than just shaving it all off, there are two hairstyles used by balding guys. The first is the COMBOVER and is by far the more common. It’s used by guys who don’t like that they are going bald, and in a futile attempt to slow down time they let parts of their remaining hair grow and use it to try to hide their increasingly hairless scalp.

But the second is the much rarer WHOGIVESASHIT and is demonstrated here perfectly by Seth Lloyd. It’s used by guys who have neither the time nor the inclination to bother about what anyone else thinks. It involves just letting the stuff grow freely and flap about like a just-caught mackerel on the boat deck. Props to these guys.

[nschulz]

no mention of quantum gravity but any discussion with Seth Lloyd is worth the time

[jayfig]

The problem is that people and things pop in and out of reality throughout our lives, and everything at a distance we thought was linear, isn’t. And that attacks people’s assumptions with causality. Once you remove the assumptions we make, quantum mechanics just starts to make sense. And here’s a news flash. Once it makes sense, it starts to be more evident to the individual observer.

[roberthodgins]

“If I disappear suddenly, you’ll know what’s going on “. Anyone heard from Seth lately?

[victorguzman]

What about Quantum Gravity in the title????
They never spoke or mentioned that in the video!

[tomgrimes]

Thank you for eliminating the floating camera effect.

[david.thomas.]

Reminds me of the Vedanta concept “acintya bheda abheda tattva” - the truth is inconceivably one and different.

[romliahmadabdulnadzir]

Manifolds belong to the branches of mathematics of topology and differential geometry. The main idea here is that even though our real-world data is high-dimensional, there is actually some lower-dimensional representation.The underlying idea is that manifolds are like curves and surfaces, except, perhaps, that they might be of higher dimension. Every manifold comes with a specific nonnegative integer called its dimension, which is, roughly speaking, the number of independent numbers (or “parameters”) needed to specify a point.

[FisicoNuclearCuantico]

I agree with Seth. Quantum Gravity is very important because it studies gravity and its interaction with matter at its most fundamental level.

[KaliFissure]

The centre core of both proton and neutron is a neutralized charge pair +/- chasing each other at c. The rotation causes inertia which is generated by Machian principle. Space being thixotropic once you get it spinning there is no friction. 3 axes of spin which is why there are 3 faces to a neutrino.

[juliocepeda]

This guy is well beyond my capacity to understand him but the title of this video is misleading. Seth Lloyd never talked about quantum gravity. Anyway the subject of quantum computing is fascinating. It's like trying to understand consciousness.

[DKonigsbach]

Their conversation is good, BUT:
1) this video is mistitled, as many here have pointed out, and
2) the date on the video (May 2, 2021) makes it look like it's current, but it's clear that this was recorded years ago, since general purpose gate-based quantum computer have advanced into the 50 - 125 physical qubit range.

[RolandHuettmann]

A very lively and interesting interview, just the title I did not understand. Where is quantum "gravity" stepping in? The essence of what I took out was to just observe and not to try to understand. We will probably never understand.

[thescoobymike]

Crazy we can build what we don't understand

[dandanner]

well where does one post or email their ideas to solve the problem..? There is literally no way to reach anyone important enough to listen. What email can people send ideas to?