I idolize Leonard Susskind, I've read and watched just about everything I can find that's been published by him. His fascinating YT lectures introduced me to science and they led me to seek further education. He's one of science's greatest minds.
59:24 "And the other thing that makes you think you're on the right track, is when something that you've been thinking about, turns out the same mathematics, the same sets of principles, turn up in another area..." awesome to hear stuff like that from one of the great theoretical minds I've had the pleasure of listening to. Thanks Drs. Carroll and Susskind,!
I highly recommend watching his theoretical minimum lecture videos on UA-cam. He explains many key equations and proofs without getting too deep into the weeds. He’s such a great lecturer.
Dear Dr. Susskind, the story about your father at the end was very touching to me personally because you have become a teacher of mine as well. Thank you.
What I like about him is that he always proceeds with caution with what he says,, Even in response to some of Sean's comments, Because he values very much the meaning and power of every single word, And that is because the only way to truly understand every concept and make real progress with a theory is to be very very clear about the type of questions you ask and the framework your start from
So, great. Even though I've spent several hours listening to both of these guys talking before, I now understand the Holography better from this than I ever had before.
Seeing the title of this episode was like Christmas morning as a little kid. My two favorite people to listen to on the same podcast? The only thing I wish they had discussed in more detail is the ER = EPR idea
I enjoy listening to both of you. Listening to Susskind is like my Morgan Freeman. I hope one day I can continue my physics degree. I majored in physics in college but college became too pricey.
I love listening to Leonard Susskind he is very direct and clear with how he presents things. But the main thing I love about him is his ideas because I am working on something which focuses on the topic of quantum information and black holes. I found an equation which shows how surface area entropy can be used to conserve information about different quantum properties of electrons in atoms as body of mass collapses to a black hole. If anyone wants to hear about it and discuss please feel free to watch the videos on my channel.
17:30 "and likewise of course of you just jumped in...": complete layman question: Why can't I jump in, read the first copy, and then somebody outside collects all the radiation and reflects it to the inside so that I can read that one, too?
Sean, my hypothesis that Dark Matter is not a WIMP, but maybe is a deformation of space-time by which the curvature of space-time ALONE is the cause of the gravitational effect. Gravity is the consequence of the curvature of space-time. It may be possible that the structure of space-time itself could be warped without the presence of mass. Space-time has been shown to react like a fabric by warping, twisting, and propagating independent of mass. These properties have been proven with observations of gravitational lensing, frame dragging, and now gravitational waves. Fabrics can be stretched, pressured, and/or heated to the point of deformation. Such extreme conditions were all present during inflation, so it is plausible that space-time’s elastic nature could have hit its yield point and permanently deformed. Therefore, if gravity is the consequence of the warping of space-time, and fabrics can be permanently deformed, then a deformation could create a gravitational effect independent of mass. Thus, the unidentified dark "matter" that seems to be so elusive to modern science may not be matter at all but merely warped deformities causing gravitational effects. DM could be a microscopic black hole with no mass at the center... Prediction: Spacetime's elastic property hits a yield point, so only that part of geodesic's "stretch marks" would remain after inflation stopped. These steep gravitational wells would not follow the inverse square law. Any thoughts?
I think we can all thank lenny for doing what he's doing, I myself am a computer science student and this type of talk is amazing I never thought about learning such things in a field that distant of mine (I figured out not that distant actually lol)
In anticipation of the Scott Aaronson interview, see the article by Ben Lindbergh, in The Ringer, where he discuss time travel in the Avengers:Endgame, and he interviews Aaronson referring to Aaronson, as today's Tony Stark, even though Aaronson has yet to see the movie.
If I accidentally drop my library book into a black hole and by ER=EPR, the two black holes are maximally entangled, do each of the black holes contain the information in the book? Nota bene to both of you as a liberal arts major, I appreciate so much you continued efforts to instruct the scientifically unwashed. (Nevertheless, are the black holes liable for the library fines? Me so ornery.)
When Lenny says (at 34:40) that ADS/CFT began describing the interior of a black hole and it's surface, then was shown to describe a region of space without a black hole in it is he saying that the correspondence implies that the universe, though it appears flat as far as we can measure does have negative curvature (meaning we are actually in ADS) and that the boundary of the universe (its 2D projection) is infinitely far away? I know he would say he's only talking mathematics, so why does he say " a region of space". Is he still talking pure geometry?
Ok, thanks for that. Can you tell me how we know that we are not in an ADS universe? Is it possible that space only appears flat on the scales we can measure?
Can you use quantum entanglement to create instant communications (ftl) between vast distances as long as the 2 communication stations start out together?
Hi Sean, I really enjoy your podcast! Keep up the good work! Have you ever considered talking with Max Tegmark about his idea of the "Mathematical universe"?
i dont know where they get there info from "( they only have QC of a feu qbits ") , considering the pentagon just purchased a 500 qbit DWave QC form google, ??
Dream big like these two and share your crackpot thoughts, because the next Sean and Lenny are already out there thinking deeply and trying to make sense of the world. Best possible interview on the subject IMHO!
Have always wanted to ask Sean why there has been such a great deal of resistance from physicists to write technical books for a public audience. Lenny really has pushed the envelope in this regard and has largely been a sole outlier.
Question to Leonard: Are black hole horizons particularly unique places where the holographic principle applies? In a universe described by quantum fields, can't we take any arbitrary surface and say that what happens on the boundary, the waves and particles that cross the boundary in the totality of time, fully describe what's knowable about the universe on the other side? I thought that as soon as you accept relativistic fields some form of the holographic principle applies and maybe black hole horizons are interesting limit cases of this universal principle.
I am not an expert but it sounds to me like you've just described one way of looking at the holographic principle. The edge of the observable universe is sometimes cited as another kind of EH. (Except in that case we're on the inside looking out).
At the nuclear level, the so called "strong force", which binds the nucleus together, has a very strong effect, but very small distance, so it is not felt outside the atom (this is called "confinement"). What binds the electron to the atom is the electromagnetic force. This force is weaker than the strong nuclear force, but fantastically much stronger than the force of gravity. Gravity is so weak that with current technology it is not detectable at the atomic scale. When you get to a much larger object like a planet with trillions upon trillions of atoms, the negative charges and positive charges of all the particles that make up the planet cancel out, so that the planet is basically electromagnetically neutral (except for small effects like compass magnetic north/south poles), so at this size and larger (stars, galaxies, clusters etc) gravity becomes the dominant force. So the short answer is gravity binds galaxies together, and electromagnetic and nuclear forces bind particles.
Sean, can you try to get Nima Arkani-Hamed on? If I recall correctly, you two disagree on whether particles are point-like or waves. It would be interesting to hear you discuss this on the podcast. Thanks!
Sean Carroll and Lenny Susskind... awesome :)
2 of my favorites, along with Brian Greene, and increasingly, Alan Guth. I also found one of Alex Vilenkin's books.
@@randallmcgrath9345 when i hit the wappijuu7
M, what are YOUR intentions?
i think that i'm supposed to be here right now , listening to this whole conversation while i'm working in the studio today 🧬
Leonard Susskind one of the most brilliant scientists of our generation; also sounds like he could beat the shit out of you in a bar fight lol
I'm a simple man. I see Susskind in the title and I click instantly.
your lost
Only because all his previous talks have failed u lol
You recognize genius when you see it. Says something about you Zack
U belong to the 90 percent ...do not worry Susskind is 0.01 percent, I love him and still get lost.....its not for everybody
I idolize Leonard Susskind, I've read and watched just about everything I can find that's been published by him. His fascinating YT lectures introduced me to science and they led me to seek further education. He's one of science's greatest minds.
Have never clicked so fast in my life!
just click PLAY 1x. the video then should play automatically.
You always had and always will click as fast as was predetermined.
Leonard Susskind is a living legend
Lenny Susskind is a delight!
Thank you for having him on the Mindscape Podcast!!!
"Your optimistic, I'm 78." Hilarious
You're*
You're
I rarely give instant likes on YT videos, but this one required it
same here, instant like
wow your clicks are so wonderful and rare, Sean Carroll is a lucky man
59:24 "And the other thing that makes you think you're on the right track, is when something that you've been thinking about, turns out the same mathematics, the same sets of principles, turn up in another area..." awesome to hear stuff like that from one of the great theoretical minds I've had the pleasure of listening to. Thanks Drs. Carroll and Susskind,!
I highly recommend watching his theoretical minimum lecture videos on UA-cam. He explains many key equations and proofs without getting too deep into the weeds. He’s such a great lecturer.
Dear Dr. Susskind, the story about your father at the end was very touching to me personally because you have become a teacher of mine as well. Thank you.
What I like about him is that he always proceeds with caution with what he says,, Even in response to some of Sean's comments, Because he values very much the meaning and power of every single word, And that is because the only way to truly understand every concept and make real progress with a theory is to be very very clear about the type of questions you ask and the framework your start from
So, great. Even though I've spent several hours listening to both of these guys talking before, I now understand the Holography better from this than I ever had before.
I like listening to geniuses. There's no flim flam and waffle. Just pure thoughts.
I am ridiculously excited about this one :)
As a computer science student and physics enthusiast i think the collaboration of both fields is amazing as was stated here , Awesome podcasts ! :)
i love listening to this even tho i dont understand anyting thanks sean love u
I've listened to all your podcasts, I'm addicted to your voice and knowledge. Thank you 🖤
Even so, "i'm addicted to your voice" is a creepy thing to say in general.
@@hotpotts not when it calms down my panic attacks.
@@gloomyend7452 have u considered a 12 step program
Absolutely phenomenal exchange between two of the smartest, respected and cutting edge theorists of our species
Of our species?
This conversation was really very illuminating. Thank you Sean.
Seeing the title of this episode was like Christmas morning as a little kid. My two favorite people to listen to on the same podcast? The only thing I wish they had discussed in more detail is the ER = EPR idea
I can only wish this chat had gone for another hour at least, always a pleasure to listen to Leonard.
Profound bedtime stories, listening to these mind bending nightmare inducing discussions, through real headphones in the dark.
Thoroughly enjoyable - an hour too short! Huge thanks to Lenny and Sean for another great podcast. 😎
Omg I have not even watched and I know this is going to be great!
I enjoy listening to both of you. Listening to Susskind is like my Morgan Freeman. I hope one day I can continue my physics degree. I majored in physics in college but college became too pricey.
Immense thanks for having on the brilliant and wonderful Leonard Susskind!
This episode is absolute gold
thank you so much i've been waiting for this so long
Great way to start my work day listening to these two brains.
Just bought your book *spacetime and geometry, an introduction to general relativity* Can’t wait for it to arrive in the mail!!
How was it?
This deserves billions of more likes
I love listening to Leonard Susskind he is very direct and clear with how he presents things. But the main thing I love about him is his ideas because I am working on something which focuses on the topic of quantum information and black holes. I found an equation which shows how surface area entropy can be used to conserve information about different quantum properties of electrons in atoms as body of mass collapses to a black hole. If anyone wants to hear about it and discuss please feel free to watch the videos on my channel.
physicist and fan of Susskind for ~ 30 years, what great fun!
My dissertation used the Kogut-Susskind Hamiltonian as a starting point for lattice computation experiments. Thanks Lenny!
GREAT pod cast..! Several of my favorite subjects of science
Just discovered this podcast from UA-cam recommended. Now I have 45 episodes of science podcasts to listen to 😀
17:30 "and likewise of course of you just jumped in...": complete layman question: Why can't I jump in, read the first copy, and then somebody outside collects all the radiation and reflects it to the inside so that I can read that one, too?
One can't reflect gravitational waves.
Sean, my hypothesis that Dark Matter is not a WIMP, but maybe is a deformation of space-time by which the curvature of space-time ALONE is the cause of the gravitational effect. Gravity is the consequence of the curvature of space-time. It may be possible that the structure of space-time itself could be warped without the presence of mass. Space-time has been shown to react like a fabric by warping, twisting, and propagating independent of mass. These properties have been proven with observations of gravitational lensing, frame dragging, and now gravitational waves. Fabrics can be stretched, pressured, and/or heated to the point of deformation. Such extreme conditions were all present during inflation, so it is plausible that space-time’s elastic nature could have hit its yield point and permanently deformed. Therefore, if gravity is the consequence of the warping of space-time, and fabrics can be permanently deformed, then a deformation could create a gravitational effect independent of mass. Thus, the unidentified dark "matter" that seems to be so elusive to modern science may not be matter at all but merely warped deformities causing gravitational effects. DM could be a microscopic black hole with no mass at the center...
Prediction: Spacetime's elastic property hits a yield point, so only that part of geodesic's "stretch marks" would remain after inflation stopped. These steep gravitational wells would not follow the inverse square law. Any thoughts?
If space-time had plasticity, it would make it much less fundamental than what it seems to be.
So glad you made this episode! Thanks! :)
The most awaiting one ....!
17:00 How can you jump inside event horizon and leave? What does "jump in" mean? Something else?
Cool fact...Sean actually played the intro live with Lenny on base
I think we can all thank lenny for doing what he's doing, I myself am a computer science student and this type of talk is amazing I never thought about learning such things in a field that distant of mine (I figured out not that distant actually lol)
I'm putting my headphones on for this one 😎
Is the plank length on the shell the same as the plank length inside the shell ie our plank length? It shouldn’t be?
Great guest and an interesting talk, thank you Sean.
I respect all the scientists but being a retired editorial cartoonist I am more monkey than human. Your honesty with humor is what I need the most.
Me too. I was waiting to hear the latest Leonard's thinking about recent findngs and the future of probing string theory and holografic principle.
Yes! Figured/hoped you'd get around to having Susskind on the podcast!
Fascinating conversation!!!!
Haven't listened to, but already liked. Kudos for inviting a legend.
Thanks Sean & Lenny!
The plumber is here!
ProbablyNotMe why you hate him ? He’s brilliant you fucking brain dead 💀
@@babylongate and you are?
Shoopaah me what? Why you hate Susskind? He’s the best man ever
@@babylongate I think he's talking about the end of the talk where susskind said he's dad was a plumber, not making fun of him :)
It was delightful listening to this podcast
In anticipation of the Scott Aaronson interview, see the article by Ben Lindbergh, in The Ringer, where he discuss time travel in the Avengers:Endgame, and he interviews Aaronson referring to Aaronson, as today's Tony Stark, even though Aaronson has yet to see the movie.
If I accidentally drop my library book into a black hole and by ER=EPR, the two black holes are maximally entangled,
do each of the black holes contain the information in the book? Nota bene to both of you as a liberal arts major, I appreciate so much you continued efforts to instruct the scientifically unwashed. (Nevertheless, are the black holes liable for the library fines? Me so ornery.)
I wish the two of you would address Roger Penrose's CCC. Seriously.
great guest thank you
Nice recommendation 4 years later. Good talk. now have to check the latest..
Just started listening, already know this is historical
When Lenny says (at 34:40) that ADS/CFT began describing the interior of a black hole and it's surface, then was shown to describe a region of space without a black hole in it is he saying that the correspondence implies that the universe, though it appears flat as far as we can measure does have negative curvature (meaning we are actually in ADS) and that the boundary of the universe (its 2D projection) is infinitely far away? I know he would say he's only talking mathematics, so why does he say " a region of space". Is he still talking pure geometry?
Ok, thanks for that. Can you tell me how we know that we are not in an ADS universe? Is it possible that space only appears flat on the scales we can measure?
I have never had an hour go by so fast
Can you use quantum entanglement to create instant communications (ftl) between vast distances as long as the 2 communication stations start out together?
2 genius personalities coming together for our beautiful entertainment and learning
Pure
Physics cosmology and the experts philoshophy and culture of science humanitarian
Wish there was video for this as well
Hi Sean, I really enjoy your podcast! Keep up the good work! Have you ever considered talking with Max Tegmark about his idea of the "Mathematical universe"?
Woohoo saw the title and clicked immediately
Same man. These guys are great.
Great job Sean
i dont know where they get there info from "( they only have QC of a feu qbits ") , considering the pentagon just purchased a 500 qbit DWave QC form google, ??
Superb thank you Sean and Lenny.
Cool... Sean inviting some Tim Morton ideas into the convo... i love when physicist bring up philosophers and vice versa
He is truly Leonard
Brilliant, lets get the snacks and coffee ready. This should be awesome.
OMG He did it! He really did it! Thanks so much for this!
Wonderful. Thank you.
This is awesome ...
I wonder about quantum information loss when merging black holes partially evaporate due to gravity waves?
a photon has a speed c in vacuum so i always know its speed and its position from its source after n seconds is lightspeed*n. so was Heisenberg wrong?
Dream big like these two and share your crackpot thoughts, because the next Sean and Lenny are already out there thinking deeply and trying to make sense of the world. Best possible interview on the subject IMHO!
1:05:00 one of the world's leading theoretical physicists confirms flat earth
An intro for Susskind is as necessary for armchair physicists as it is for introducing Bob Ross to a hobbyist painter.
Two Geniuses discussing a great subject
Two great scientists amazingly good communicators! Lenny is now 85 (aug. 2024) and still going strong. I suspect he rides on asymptotic freedom!
Until we observe black hole and know what it is/does and if it does radiate in Hawking radiation , how can we know?
instant click and like ..this is like the main billing ..
Have always wanted to ask Sean why there has been such a great deal of resistance from physicists to write technical books for a public audience. Lenny really has pushed the envelope in this regard and has largely been a sole outlier.
The content was very good, but as I always say, you have to get a volume compressor in order for the audio to be good.
This is such a treat
Question to Leonard: Are black hole horizons particularly unique places where the holographic principle applies? In a universe described by quantum fields, can't we take any arbitrary surface and say that what happens on the boundary, the waves and particles that cross the boundary in the totality of time, fully describe what's knowable about the universe on the other side? I thought that as soon as you accept relativistic fields some form of the holographic principle applies and maybe black hole horizons are interesting limit cases of this universal principle.
I am not an expert but it sounds to me like you've just described one way of looking at the holographic principle.
The edge of the observable universe is sometimes cited as another kind of EH. (Except in that case we're on the inside looking out).
Very nice discussion. Stimulating !
two brilliants I admire!
Did they have to go or something? Seemed to just end rather abrutly. Perhaps ask for a closing thought?
Richard Feynman & Leonard Susskind would have been hilarious to hang around. Can you imagine those 2, just chilling together? Ah haha 😄.
Thank you so much for this.
Susskind is even beyond Feynman in explaining something clearly and interestingly
My experience of physics through a screen - Sean Carroll (TV), Walter Lewin (YT) and Leonard Susskind (YT)
2 particles or 2 galaxies
Do they attract using the same force or forces...???
At the nuclear level, the so called "strong force", which binds the nucleus together, has a very strong effect, but very small distance, so it is not felt outside the atom (this is called "confinement"). What binds the electron to the atom is the electromagnetic force. This force is weaker than the strong nuclear force, but fantastically much stronger than the force of gravity. Gravity is so weak that with current technology it is not detectable at the atomic scale. When you get to a much larger object like a planet with trillions upon trillions of atoms, the negative charges and positive charges of all the particles that make up the planet cancel out, so that the planet is basically electromagnetically neutral (except for small effects like compass magnetic north/south poles), so at this size and larger (stars, galaxies, clusters etc) gravity becomes the dominant force. So the short answer is gravity binds galaxies together, and electromagnetic and nuclear forces bind particles.
Sean, can you try to get Nima Arkani-Hamed on? If I recall correctly, you two disagree on whether particles are point-like or waves. It would be interesting to hear you discuss this on the podcast. Thanks!