Complexity and Gravity II - Leonard Susskind

Prospects in Theoretical Physics 2018: From Qubits to Spacetime
Topic: Complexity and Gravity II
Speaker: Leonard Susskind
Date: July 26, 2018
For more video please visit video.ias.edu

[@alimibrahem8120]

all respect and love to prof Leonard susskind I hope to stay healthy and well..💕

[@dontgetmadgetwise4271]

Indeed. Sounds like he could be diabetic. A global disease.

[@ankidokolo]

The good old Lenny talks about the complexity of the thermodynamics of Gravity. Really enjoyed.

[@silberlinie]

Leonard Susskind is on a really hot new thing. Brilliant. That's what keeps the world moving. It is important to follow that.

[@TheMemesofDestruction]

And go beyond. ^.^

[@Bellenchia]

He truly has a sense of humor

[@relike868p]

Watching this in 2022 with those epidemic analogies becoming real epidemics

[@zaphhood4745]

Thanks Lenny.

[@realcygnus]

cool stuff

[@TheMemesofDestruction]

22:00 - Fascinating!

[@TheMemesofDestruction]

31:00 Complexity Grows

[@schmetterling4477]

Yes, even a student learning Einstein's equations notices that they look like thermodynamic equations. So what? People have been saying that for over half a century now with zero progress in actual physics.

[@madeleinebirchfield7658]

There is a fundamental misinterpretation of spacetime, geometry, and gravity in general relativity: what physicists typically call 'curved spacetime' is more accurately a geometric representation of the strength of the relativistic gravitational field, as general relativity is a classical gauge theory. In quantum gravity, when they say that 'spacetime ought to be quantised or discrete', they really mean that the 'relativistic gravitational field ought to be quantised'. This already has a corresponding analogue in second quantisation and the development of quantum electrodynamics from classical electrodynamics, which also has a geometric interpretation (the dirac matrices could be thought of as unit vectors in a 3+1 dimensional geometric spacetime), but which does not mean that electric charges physically curve spacetime or caused spacetime to be quantised. The statement ER=EPR is more accurately stated as 'a wormhole is a geometric representation of entanglement between two particles'; this does not mean that wormholes actually exist in the real world, only that the strength and directions of the gravitational field is determined by the entanglement of the particles inside the field.

[@NightmareCourtPictures]

facts bro

[@Unidentifying]

The electromagnetic field is represented by ions, electrons, photons; so what according to you constitutes the gravitational field ? . .

[@wordysmithsonism8767]

Anyone know "g lads" definition?

[@Chiavaccio]

👏👏👏👏

[@dckeitshokile3390]

💪💪

[@brian554xx]

ER = EPR ∴ P = 1

[@NoActuallyGo-KCUF-Yourself]

That's that advanced math right there!

[@nolan412]

🎱*🎱 ----------

[@catbertsis]

P = 1 ∴ P = NP

[@josephlau13d77]

P is Podolsky, a physicist can't be zero..

[@aryamanmishra154]

@@josephlau13d77 oh god it's a fucking joke

[@naimulhaq9626]

I had been waiting for a long time for this lecture, that not only talked about ADS/CFT correspondence by Maldacena, but also touched on the most important aspects of complexity, self-error correcting, infinite dimensional, algorithm unknown, self-simulating quantum computing function, leading to production of fine tuned particles/strings, creating life with perfection and with probability one. Proving QM is completely deterministic. Feynman would have loved to watch part 1 and 11. Part 1 started with a wave function, reminiscent of Hartle-Hawking no boundary universe theory. Life is also a QC function, enabling us to repair/regenerate 50-70 billion cells damaged daily at 99.99 % efficiency and at lightning speed. Implying divine purpose, empowering us to comprehend what is incomprehensible.

[@davidwilkie9551]

Trancendental Meditation, correspondence and Geometrical Drawing and Perspective Projection. Wordless recognition required after the lectures.., "think for yourself". Observation of WYSIWYG QM-TIME Completeness cause-effect leads inevitably to the probabilistic "Laws of Precedent", the con-sequence of this sum-of-all-histories Event here-now-forever, composed of elemental e-Pi-i sync-duration wave-envelope Math-Phys-Chem and Geometry phenomena. It depends on the degree of legitimacy in density-intensity real-numberness condensation, how "physical" the Event is interpreted. We are, individually, of/in inside-outside this Mind-Body Universal (Life) Principle. Gravity and Perspective are AM-FM Fluxion-Integral Corpuscle-aspects of ONE-INFINITY Singularity, floating vertical phase-locked frequency integration/alignment of trancendental Reciproction-recirculation, in an i-reflection transverse cross-sectional synthetic relative-timing Apature.., holography.

[@allen2879]

This is a very basic presentation, are there any more in-depth studies?

[@luisfelipe7351]

if time can be mathmaticaly expressed as a function of mass as you oberve in a sandglass flow of the grains following gravity then it can also be understood as something multidimensional as masses and gravity is spread through out the universe in different positons in space , thus time

[@brian554xx]

1:15:00 I picture myself putting on my 'God' gloves, moving up close to a black hole, and giving it a quick thump with one finger to see what happens. (The gloves are so I don't lose a finger.)

[@iamnotevenanumber3312]

You will never reach the black hole. Not even with a God-glove. Even if you just assume you did reach the black hole, it is not something that exist as a 'thing', it is just a singularity, so there will be nothing to thump. Even if you just assume there is something to thump, you would not be able to thump anything. Not even with you God-glove. Because you cannot send information (from your brain and finger muscles) to the end of your finger. It will take an infinite amount of time. :-D //nerd-mode off

[@thegeniusboy7049]

I am genius boy from India

[@KyleDB150]

Don't read the comments, here only madness lies

[@nickmagrick7702]

thats why people come to the internet comments section, hence the abundant madness

[@charlesbrightman4237]

36:40 into the video: What if there are more than one wormholes that interconnect with other 'dimensions'? For example, let's say that the 'gem' photon is the energy unit of this universe and all 3 modalities of the energy unit basically interact at 90 degrees to each other in a unified way. Two worm holes would always be dependent upon the third wormhole and the third wormhole would always be dependent upon the other two worm holes. (The 'wormholes' interconnecting the different modalities of the 3 in 1 energy unit with each other in some unified fashion.)

[@kostaskrikos4153]

A geometric description for Universe is in the book: ‘’ THE BEGINNING, THE EVOLUTION AND THE END OF THE UNIVERSE’’ Amazon Author: Constantinos Krikos

[@Aman-tf8bt]

why are we identifying the circuit with discrete time when all transformation that evolve with time are contionous?

[@Mattgini1]

Precisely to introduce time quatification. That way the stringgies and loopies can do their maths

[@matttirado7661]

If gravity is caused by mass warping spacetime then how is it possible that gravity exists in space that has no mass?

[@schmetterling4477]

Things don't have to exist to cause effects. Physics is actually mostly about things that are absent.

[@KilgoreTroutAsf]

Huh? If vibrations are caused by you tapping on the table how is it possible that vibrabions exist where you are not tapping?

[@MARILYNANDERSON88]

Landslide

[@Mattgini1]

flabbergasted I suppose?

[@charlesbrightman4237]

About 19:38 into the video: Possibly when entropy stops growing, the intensity grows. "If" a threshold is reached, possibly whatever was 'entropied', flies everywhere. Basically a black hole 'bang'. Otherwise, without any threshold, the intensity would infinitely grow with no place to go. Another possibility might be that when a threshold is reached, possibly whatever was 'entropied', collapses back in upon itself. Another possibility might be that when a threshold is reached, possibly whatever was 'entropied', changes it's state of existence.

[@charlesbrightman4237]

22:49 into the video: If we are talking about 'gravitational' black holes, then what exactly is 'gravity' and how exactly does it do what it does? For example: The current narrative says that gravity is matter bending the fabric of space time. (Of which also raises questions, what exactly is space, what exactly is time, how exactly does space time 'bend'?) But okay, accepting that for now, then: a. Why don't all the individual pieces of matter orbiting Saturn in Saturn's rings fall down to Saturn's surface, as the 'dent' in the fabric of space time would be greater at Saturn's surface than the 'dent' in the rings? b. Is our solar system being pulled toward our galactic center due to the 'dent' in the fabric of space time that all the matter in the center of the galaxy makes? And if so, what eventually happens? "Big crunch"?

[@orathaic]

No, because those piece of Saturn's rings have energy, their motion keeps them circling the dent. If they lose energy by emitting gravitational waves, then they will eventually spiral in...

[@MarsPioneersGroup]

Thankful for Leonard Susskind explaining Physics in simplified terms, so that more People can get some understanding of their World and Universe. I wonder if this helps explain how the DNA Double Helix is built in the 3rd Dimension? Perhaps the Black Hole is a 4th Dimensional Space, where a Double Helix is being built. The White Hole and 'butterfly' scenario, could explain mutations in DNA to build new Species.

[@fredriksvard2603]

I dont understand anything hes saying but it seems cool

[@Datamining101]

This one comes across differently in 2020.

[@nickmagrick7702]

how

[@Datamining101]

@@nickmagrick7702 the epidemic model at 55:50

[@MrTommy4000]

Sadly, I now must admit to myself how little I am aware of the details of the big picture. I have to wonder though, is our mind programmed to run these calculations without conscious ability. I think not. But maybe just a little.

[@Mattgini1]

Very good question indeed. If we embrace the full extent of the holographic quantum nature of black holes it could very well be; as much as the arbitrary limitation of the degree of freedom on the axis of time we experience. For the rest you do the maths. And again, great question.

[@nickmagrick7702]

are you asking if we have free will?

[@divisorplot]

get artistic maybe draw hexagonal cubic box ~! [ottffssent] hexagonal cubic comet saturn sa-turn sat-urn symmetry a-turns.geometric universe rocks and mineral natural science physics

[@bairbrenibhraonain5243]

Like what James Joyce called a pier - a disappointed bridge

[@charlesbrightman4237]

1:25:37 into the video: Decreasing entropy: Consider the following: a. The hexagon on Saturn. From disorder, order arises. b. An active universe interacting with itself, a black hole arises. From disorder, order arises. c. From a supposed 'big bang' the forces of nature supposedly arise. From disorder, order arises. d. From a supposed 'big bang' matter itself arises. From disorder, order arises.

[@nolan412]

Imagine Feynmann would have a reason to call them circuits.

[@nolan412]

An end of life blackhole reignites?

[@TeodorAngelov]

suy kits

[@charlesbrightman4237]

When speaking of 'time', 'time' must have some sort of actual existent reality in actual reality, otherwise it would be nothing more than just a concept on paper. For example: "Speed" is distance divided by time. Distance is two points in space with space between those two points. Both space and time have to have some sort of actual existent reality (other than just as a concept on paper) for speed to actually exist in existent reality (other than just as a concept on paper). And speed would have to actually exist in existent reality (other than just as a concept on paper) for the speed of light to actually exist in existent reality (other than just as a concept on paper). So, 'if' speed of light actually exists in existent reality (other than just as a concept on paper), then speed, space and time also must exist in existent reality (other than just as a concept on paper). Which then raises the questions: a. What exactly is 'space' in existent reality (besides just being a concept on paper)? b. What exactly is 'time' in existent reality (besides just being a concept on paper)? Once space and time are more accurately defined, it would seem it might make a difference in the formulas. In other words, dealing with actual existent realty other than just with concepts on paper (which might not be actually correct in actual existent reality).

[@nibnob9]

WHAT IF WE'RE ALREADY IN THE WORMHOLE RIGHT NOW

[@nibnob9]

LIKE FISH IN WATER

[@EliotMcLellan]

PARAMEDICS FAIL EXPONENTIALLY

[@MARILYNANDERSON88]

Eliot McLellan sadly we think of failure applications. A posiive growth may also be described..

[@siquod]

Why are there so many deranged people in this comment section?