Edward Witten Lecture - Dimensional Gravity Revisited (1/6)-GzY

[Taqu3]

Turn on the captions makes more sense

[HumaneAnon]

Get this man some lessons on public speaking and articulation. He could be so much more of a visionary if he made the content of his lecture more palatable to the students and colleagues. Have him watch Brian Greene to practice simplisticity in language and general manner in vocal inflection.

[nckey42]

Wow your smart Dr. Witten... But, you should have Morgan Freeman read all your lectures for you

[convanjo]

@nckey42 Super Wise saying.

[baldricksnosehairs]

one of the most intelligent people in the world but talks like a 3 year old on crack cocaine, omg how frustrating ! GAHHHH

[Icix1]

Gahhh what is he saying I really want to know

[Linusknollhouse]

Who is c527?

[sbergman27]

Publicly available lectures by Ed Witten are rare. And whoever was responsible for the sound recording of this one should be sought out, strung up, hanged , quartered, and then stomped upon by a a pack of kangaroos until... until... until... he's had enough. The pieces then being laid out on the Washington D.C. Oval for 3 days to be spit upon by passers by. And then flushed down a public toilet.

I can't understand a word Ed is saying.

[Linusknollhouse]

Dr. Ed Witten, sir, I don't know the specifics yet... But I humbly believe mathematics is using an outdated tool for counting. Perhaps sir, you scholars can use what has been experimentally proven to represent numbers like we do with vectors, sir. If a vector symbol can contain more than the scalar quantity that is a number, couldn't we create a symbol with what's fundamental in quantum mechanics to build up? Thank you for reading this sir.

[fon267]

@Linusknollhouse Absolutely no,

Ed



[MauroRincon]

There are some errors Ed then... I'll let you know the corrections in the next vid.

[pacoarcas666]

If we are going to survive as species only Ed Witten should be allowed to have children

[bonnarj7]

totally wrong again ed.

[badnewswade]

sound quality is very poor :'(

[LeconsdAnalyse]

Anyone can copy the original mathematical ideas produced by others. In the absolute scheme of things, It`s when one has original ideas of his own that`s worth its weight in gold. By his work, i see that Witten is both creative and original.

[boshitobreath]

Ed could spend some time on the exercise bicycle...

[mikeroephonics]

@boshitobreath He might want to wear a jacket since it's getting kind of super cool story, bro outside.

[boshitobreath]

Ed could use a little time on the exercise bicycle....

[usageee]

@boshitobreath Why would you want the smartest man in the world to waste valuable time hanging out in the gym? He only has a finite amount of time to crack String Theory.

[jamma246]

@usageee Haha, well put!

[rinwhr]

I am now deaf

[mescience]

Perhaps multidimensional math in a 3d spatial world is not the same as multidimensional math in a 10 Dimensional world?  Take a 2 dimensional world, flatlander, with 2 Dim math, how would one describe a sphere mathematically, if you wouldn't even know a sphere exist? We have math for a 3 dim world, and don't even know what 4 dim world even looks like. Perhaps the other dimensions aren't spatial.

[mrqsilveira]

Who owns Truth?! Some things I say I proudly borrow from others. Spinoza brought about the equivalence of 'God and Nature' which I changed into the "The reason why it [Existential Quantum] exists is the same why it acts" axiom, reinventing it along with the Strong Principle of Equivalence. This is the convergence of the hierarchy of the arrows of explanation. I acted on previous ideas and concepts, reinventing them, the "Existential Quantum", while pushing ahead the frontiers of science.

[mrqsilveira]

Steven Weinberg, in "Dreams Of A Final TheoryF ." warns that Quantum Physics is ugly, really clumsy... a good theory must be beautiful and exert a sense of inevitability! QP does not stand up to either ones. But QP is the most successful theory ever! Present technology depends so much on QP! General Relativity is both beautiful and has got a sense of inevitability, but it is of a little use, with equations hard to solve. This is the deepest pain in the heart of Physics, says Weinberg.

[yuothineyesasian]

@mrqsilveira Well, if string theory is correct then we would see the beauty that Weinberg, and I, desire.

But just because physicists want there to be a simplistic, mathematical way to describe our 'beautiful' universe does not mean that this is how the universe truly is.

[mrqsilveira]

You're right about it! The universe does not necessarily show up according to our desire. But, you know what.... I've got this feeling - which is just my instinct of synthesis expressing itself - that there must have this simplistic, mathematical way to describe our 'beautiful' universe.

[dompeeeee]

that is the beauty of math my friend it s a universal language that is spoken the same in every corner of the globe, why is everyone discussing time as if it were its own "entity" for lack of a better word, without space their is no time and vice versa, so until someone proves Einstein wrong, which many have tried and all failed, i'll stick with spacetime and keep trying to make it fit in the standard model...perhaps the issue lies there and not with spacetime?

[mrqsilveira]

Two points why one should try messing up with general relativity instead of quantum physics:

1. Violation of equivalence principle. I think this is possible because Einstein's Equivalence principle is not the Omega station of the arrows of explanation.

2. Quantum physics is not derivable from any other wide branch of theoretical physics. The Standard Model should stay as it is!

[dompeeeee]

I never said you or anyone else shouldn't try messing with it, that is my personal angle of attack at the issues, and you can use as many (!) as you want but what you think should be may not end being the case, not to mention I doubt those are your words to begin with,

[tabovilla]

to me the real mystery is. . how can MATH even begin to describe such things. . . amazing..

[vanderbilt887]

Quantum physics deals with time, have a look at the time dependent Schrodinger equation. Those interested in removing time, the controversial physicist Julian Barbour is worth looking at.

Some physicists think that spacetime should be quantized at the very smallest scales (What would be the nature of spacetime at the Planck scale). Quantum mechanics, as I understand it, deals with time in a classical sense.

[vanderbilt887]

That's why a few physicists think that time itself should be thought of as quantized (chronons and/or Plank time). Whether this is the correct approach, remains to be seen.

What really interest me is what description of time would be necessary for a correct theory of quantum gravity. Also, what happened at the beginning of our universe when it was younger than a unit of Planck time? How would time be adequately described during the Planck epoch?

[vanderbilt887]

Interestingly, Witten thinks himself that the notion of time will begin to break down at that point.

It may very well be that -in principle- we will never find out. (In fact, I think that's very likely). I know it's certainly Hawking's dream to know what happened at the Big Bang. Like Einstein, he thinks understanding that is "knowing the mind of God".

[mescience]

Removing time from quantum theory is interesting. I didnt realize that time was part of the quantum world.  I thought it was at the macro level.

[mrqsilveira]

Such magnificent observation!

[beliefdivides]

I'm sure time - in the overall theory of everything - is a paradoxical illusion. But because of our particular dimensional existence we are fooled and misled by it. If you remove time from quantum theories I'm sure many answers will be found.

[GuerrillaForce]

I'm very grateful that this lecture was posted, but I agree with the previous poster that the audio quality is sub-par. I mean, I berated another member that was criticizing Stanford's Susskind lectures for its supposed lacking quality, but this is pretty bad. All it would take is a little EQ'ing, that's it, so if the original uploader would give me permission, I can do it myself.

Then again, if this is public license, I'll just do it anyway. But I don't know shit about copyright laws LOL

[mrqsilveira]

I must confess that I worked as a systems programmer and I was forty years old when a fellow coworker said that General Relativity was a gravitational theory. I didn't know it! I wanted so much to understand it! Twenty years before I was a dropout from Physics Institute of University of São Paulo, in Brazil. I think I shouldn't have said that. Anyway...

[mrqsilveira]

We would like to review Ed Witten with a brand new good sound system! Or some hacker can rub off the noisy from this vid...

[mrqsilveira]

Point to think:

"LANGUAGE IS MATHEMATICS PICKED UP BY NATURAL SELECTION AND VICE-VERSA."

[mrqsilveira]

I am totally convinced that we must introduce Species Evolution into a wider approach for a quantum gravity theory. To bring this into the game we may consider Species (Evolution) as spontaneous symmetry break on Nature. This brings us in a single step as close as possible to the fundamental state of the Universe, linking it to the emergence of life then. Suggesting also a topological framework to treat it.

[Jimihendrixq]

For a technical institute they don't have a very good sound system.

[Ph4ntom74]

LOL

[chopin7tristesse]

@Jimihendrixq Maybe because technical in theories. 

[mrqsilveira]

It seems weird that we only perceive time one-dimensionally even theoretically! No! That's not correct! We perceive time in at least three dimensions: past-present-future. If you take English language past is just past with some light variations. In Portuguese - my mother language - past has several different modes: past! imperfect past! perfect past! more than perfect past! Is time multidimensioned? Is time fractal? What? Why entropy seems to impose one direction to time? Entropy x Life??

[yuothineyesasian]

I read an older book called The Arrow of Time. Because entropy is not reversible, due to the fact that heat expands into cold.

For time to be three demensional we would need to move easily in all three directions. Most would agree that this is impossible.

[mrqsilveira]

I think that by the Grace of God we, living beings, invent the Holy Spirit, cause this is necessary for bringing together our option to exert freedom and God's omnipotence. Then life must easily flow in any of the existing knowable dimensions of time of past, present and future. When we are unable to invent the Spirit we are resentful of the past and the future is delusion. My friend, I like to see Jesus as one of the Greatest Masters of this holy invention! I'm weak but strong in the Lord!

[mrqsilveira]

Hello! I really appreciate your specific position: A 3-dim expansion of time implies a human modified connection with the 3 known degrees of freedom allowed by space alone. Could that relate to teleportation?

[cyberflo999]

To say that we percievetime in as a one dimensional entity simply means that time flow from past to future, that an event cannot have consequences in its own past, and has consequences in its future.

What you are refering to are ways for languages to locate events. Let's say A happened in the past and B is even more remote than A. Some languages have a tense to express this particular distinction. But this has no consequence on the fact that all humans have only a 1D view of time!

[cyberflo999]

my first paragraph refers to a principle known as causality.

[mrqsilveira]

Good lesson. Thank you! There remains open a valid but weird question: How does language - any semantic level of it - emerge in and inserts itself within the universe as an hologram? Anyway, I specially liked the expression "ways for languages to locate events", which points to Leibnitz's position: Spacetime is the vocabulary for expressing the location of events (Brian Greene - The Fabric of the Cosmos) . I would like to kindly remind you that ENTROPY-ARROW OF TIME-LIFE are all related.

[iattackenemy]

why does he say 2+1 instead of 3

[mrqsilveira]

2-dim-space plus 1-dim- time!

Time is always one-dimensional...

That might prove to be wrong if we find out that species evolution interfaces quantum physics and general relativity!

[EinSofVirtuoso]

Its a a reference to Supergravity and Loop gravity theories. Something to do with Supersymmetry and anti DeSitter tensors and what not.

[mrqsilveira]

Once in a while God feels like playing dice...

A quantum gravitational universe emerges then!

Who cares?!

[Krumbz2003]

He may as well have said...

"pink butter face + 9 foot toenails = 3 amusing liquid headaches"

I'm in left field at midnight with a blind fold on - swinging a whiffle ball bat at lightning bugs.

That's what I'm sprayin'... you feelin' kind of damp?

[mrqsilveira]

That's funny! I like it as much as I am fond of jewish irony for surviving purposes... Everybody should necessarily use it once in I while. I do myself! Let us see what Witten is going to take out of his hat...

[vrem]

edward witten pwns the hardrons

[mrqsilveira]

What do you mean, please?

[TheAssgas]

he means he pwns the hardons.

[mrqsilveira]

Ah.......

[mrqsilveira]

There is some allurement in the way Witten conjugates body movement and thought...

Freud finds something utterly delicate - a butterfly - in the "Gradiva, a pompeian fantasy" of W. Jensen. That's about Gradiva's lifting the foot fom the ground...

Witten's got this rare gentleness for a man which mirrors Weinberg's 'grace of tragedy'!

While, Witten should display 'the feline predator's mastery of defying the limitations of matter' in Amos Oz's "To Know a Woman".

[mrqsilveira]

"The effort to understand the universe is one of the very few things that lifts human life a little above the level of farce, and gives it some of the grace of tragedy." (S. Weinberg)

[TrylaG]

Wow Ed sucks at power points haha! Combine Witten's knowledge with Feynman's lecturing ability and this would be an amazing talk.

[troponinnutrition]

possibly the coolest guy on earth.

[norinco77b]

I have got a PhD in Physics. I have studied many years of quantum mechanics, general relativity and second quantization, and yet I admit I could make sense of only 20-30 % ...

[thevidfather]

Wow, this is so far beyond my understanding of physics...

[farad007]

dang! this lecture is beyond my current knowledge :(

[panteraz3]

Thanks.

[NInails19]

Edward witten Kicks major ass!

[Baldwynmayhem]

@NInails19 Seems like a very nice and humble human being as well, certainly his work and his personality are to be looked upto by others.

[lsjtifo]

@Baldwynmayhem Very true. And many others of comparable achievements must take a leaf from his character. Ed's rendevous with his explorations in the mathematical-physics world have obviously made him humbler and humbler. True and good education must lead to both knowledge and humility, which only can be called wisdom.