Sean Hartnoll | From Black Holes to Superconductors - 2 of 2

Black holes have the remarkable property of irreversibility: if you fall into a black hole you can't get out (classically). This immediately suggested a connection with the other famous irreversibility in physics: the law of increase of entropy. Since the 70s, this connection between black holes and thermodynamic systems has been fleshed out in increasing detail and has lead to surprising conclusions. I will give an introduction to a recent body of work showing how black holes can in fact be used to shed light on exotic materials of interest in condensed matter physics, including the still-not-understood high temperature superconductors.
Part 2 of a 2-part lecture series given by Professor Sean Hartnoll of the Stanford Institute for Theoretical Physics.

[@stuartralston5059]

Sean, awesome two lectures. You have a great style of getting your points of difficult concepts across, which helps us non-theoretical physicists to grasp these fundamentals of our universe. Agree with John - more please!

[@nobody6497]

+Stuart Ralston i did not see the the whole two lectures could you tell me if the black holes are superconducter or not through which you have see in the two lectures

[@tomdoyle2669]

Stuart Ralston n

[@samiyehmahmoudian9673]

How can some one explain the complicated theoretical physics in such a sweet and impressive way? The best description of the idea of duality that I have ever heard. Sean you are literally unique!

[@vinm300]

Excellent lecture ; a complex topic but he explains the change of variables and duality very well. Many thanks.

[@brendawilliams8062]

One of the best I have ever encountered.

[@afifakimih8823]

As good as his first lecture...excellent!!

[@johnjames5988]

Thanks Prof Hartnoll. More please.

[@mushkamusic]

@1:00.04 My next stop is a more in depth explanation on the electric fields and photons in conventional vs super conductors. I didn't get a decent grasp of that bit. These lectures are fantastic, thanks Stanford for putting these up.

[@AntiProtonBoy]

Really good series. Need more!

[@edmondedwards6729]

excellent series and what would improve it (and many online lectures) would be to close caption the audience questions, which are usually not heard well enough to understand them fully, as the audience questions and replies are sometimes very helpful when loud enough be heard over the room noise. Thanks

[@blablabla63923]

I feel like I could approach Sean and ask him questions about quantum chromodynamics flux tubes and he would genuinely explain it to me like I was Einstein’s grandma instead of .0000001 percent of the population, using tech jargon and acting like a genius that can’t be followed by virtue of being a genius - can’t say that about most scientists. More of this please.

[@ariessweety8883]

This guy just has all this info in his brain that is just spilling out and i bet he wishes he could speak faster to get it all out of his head. Im loving it, hes great! Now back to...

[@davidwilkie9551]

We can't be Mathematical without being Temporal. This pair of lectures were pivotal in making the Black Hole/Black-body Singularity Conception idea a mass-energy-momentum Projection Drawing holographic modulation process, at least in terminology before the e-Pi-i sync-duration connectivity function presented itself, by default/Observation. (Emergent Spacetime consequences of @.dt zero-infinity/Eternity-now Calculus.., Superspin and Perspective Projection Drawing holographic-modulation Principle)

[@yendorelrae5476]

Can anybody imagine the pressure? yet thrill of having Leonard Susskind actually in your audience to elaborate on your quote of him, the living legend himself, damn! 28:30 on

[@fermibubbles9375]

best lecture

[@syedaliraza3476]

Great lecture, Sean. Awesome explanations and everything. Makes so much sense. Physics and the bedrock science it is! Also, thanks to Leonard Susskind for providing these treasures including the Theoretical Minimum series to us.

[@davidwilkie9551]

Attaching identities to sync-duration vertices in vortices is like describing the bag of Donuts by the holes and axial alignment, in terms of the spin imparted by the machine that made them. No surprise that the effective operation of the math-music composition floating in nothing is difficult to see and hear, or illustrate by the limitations of 3D-T projection-drawing. Location is AM-FM alignment of resonance tuning, so the holistic sense of Superconduction is harmonic symmetry shaping. (?)

[@jianfengli1906]

Can I say there is also no charge or no coulomb interaction in the SC medium?

[@arbab64]

Very interesting talk. I recently got a mass of a photon under gravitational field as m=hbar g/2c^3, where g is the acceleration due to gravity and c speed of light. What do you say about this relation? Thank you in advance.

[@jakublizon6375]

What do you mean you by a mass of a photon? Photons do not have mass. They have energy, but it is based on frequency and Planck's constant. Gravitational fields do not impart mass on any particles, they give weight.

[@arbab64]

@@jakublizon6375 The mass of a fundamental particle represents the degree to which it interacts with its surroundings. This is fundamentally found by Higgs where the mass of a particle results from the interaction of the particle with the Higgs field. Accordingly, the mass of a photon or gravitation should depend on the degree to which it interacts with Higgs - like field (space-time that acts as a medium). Therefore, mass is not naively what a particle conations.

[@naimulhaq9626]

So, mass of the BH reside in Leonardo's holographic surface of the BH, as condensate made of bosonic fluid. However BH are known to spin almost at the speed of light, this was not explained, nor is it explained how matter is ejected from either poles and how matter falling into the BH, or the mechanism involved (weather they tend to increase the spin) and the mechanism of production of the accompanying magnetic fields of ejection, perhaps due to the condensate of charges inherent. Time elapses slowly as you approach a BH, nothing can get into a BH, not even a pebble or get out(the Hawking radiation comes out of the event horizon) . Materials sucked into the BH are spewed out and ejected. However the superconducting fluid of bosonic condensate maybe responsible for the huge spin. None the less, we get the first peep into the BH and a very important introduction. Green claimed, based on Ramanujan's mathematics that there can be 194 types of BH (!?), maybe next time Sean can give us some more of divine juice (it is not trivial to explain something you cannot see or verify, much less observe). The 'coating' of condensate acts as the stator of an electric motor, while the BH is the rotor, spinning close to the speed c. Thank you, Sean.

[@efegokmen]

Brilliant

[@yendorelrae5476]

So his teaser, that black holes are NOT made up of protons and electrons....when is this answered? I admit I am only just watching the 2nd video, but the suspense of his answer is driving me friggin crazy! Lol...great lectures!

[@pauldavidhaynes8243]

Awesome

[@donotwantahandle1111]

1:48 Photons bouncing out of black holes? Also 1:10:50 The E field is going through the condensate of charge?

[@TheMemesofDestruction]

45:40 - Mmmm, “Sugar Coated Black Holes!“ 🕳 ^.^

[@jimlahey5354]

11:30 Integrated circuits have smoke in it

[@ddorman365]

Thank you for the current and most vital analysis that is very Nessary and appreciate d,Doug.

[@brendawilliams8062]

Thankyou

[@jakublizon6375]

Is that why fluid mechanics are so damn hard? Because they include so much self interaction? I know that's how path integrals in QFT work, as well as things like turbulence. Am I understanding correctly?

[@jakublizon6375]

I thought photons don't self interact at all. The only way I can imagine a photon interacting with another photon is it one or both photons fluctuate and split into an electron/position pair, and THOSE particles interact before they can cleanly annihilate one another. I don't know if that's actually possible with real particles, or solely virtual particles.

[@arkytitan]

32nd minute: r*exp(-r²) = d/dr (-0.5*exp(-r²)), there should be minus, I guess. Without this minus the integral from zero to infinity must be -π.

[@realcygnus]

the very handsome boy genius Pierce Charming........how the heck is this dude a professor already?....cant be more than 25!.....def has an advanced intellect .....think perhaps we can expect great things from this man.....suburb free mind candy Lectures/awesome content .....Lenny's Legacy !

[@realcygnus]

just ment that the vid was posted on susskind's new stanford channel

[@jojogaming1013]

Are you gay?

[@naimulhaq9626]

The real credit goes to Leonardo, what a life and how appropriately rewarded, paid off with a brilliant insight into a BH that even Einstein would envy.

[@GuitarsnSnooker]

When guys drool. Over females it's sexism? So unfair

[@brendawilliams8062]

@@naimulhaq9626 He likes Einstein. Refreshing.

[@davidwilkie9551]

Reality of Quantum Chemistry Resonance Bonding Matrix "floats on nothing", because it's the composition of holographic projection-drawing imagery that is recirculating re-evolution instantaneous trancendental cross-sectional dimensionality In-form-ation substantiation. So 1-0 probability dominant resonance reciprocals compose Actuality by "radial", (Superspin-symmetry @Singularity), 1st law ideal gas-plasma Thermodynamics, which is perceived as Perspective Principle and time=length, inside-outside holography dimensionality coordination of Eternity-now instantaneous Fluxion-Integral Calculus Interval. The Measurement Problem, Superposition-point Identification of Elemental Electron-photon-phonon-Proton Relativity and Super properties, is a time-timing sync-duration observation POV of WYSIWYG QM-TIME Completeness, but from this same lecture, ie some "learning by doing" music-math thinking practice required.

[@bryankellsey7632]

so if i pull out the plug from archimedes timer? can we go quicker?

[@enlongchiou]

by duality, everything happen at black hole happen at proton which is quantum liquid too, w boson is that charge inside bh, Bohr atom which have electron and positron is the box, connect by equation PeA=WG^3, hc(1+2/(8*pi^3)^0.5)=126(Gev) for higgs boson which get proton mass by hc which is condensate of higgs boson .(h=6.626*10^-34, c=299792458, A=5.3*10^-11, G=6.67^10^-11,e=9*10^-31, w=80.4 gev)

[@bryankellsey7632]

like my problem is geometry explains all this. yet breaking up into alg trig and calc makes it fucked up and trivial

[@mtmariana]

OMG! Prof. Hartnoll is so attractive, it had to be said... 😍

[@KolasName]

How can it be that wiped out black marker ink doesn't retain on the hands?

[@bryankellsey7632]

so can you show me how quantum liquids act in space? can you explain in depth and maybe compare behavior to the giant deepsea jellyfish? or compare another way

[@bryankellsey7632]

we are right but we appreciate different ideas it builds me further

[@bryankellsey7632]

ok duality? einstien also said if you can move in a straight line you can slow time down to a stop and reverse it

[@brendawilliams8062]

To a point and to a point.

[@laurahraj1180]

48:43 Its so wholesome I canttttt

[@jbaumgartner]

Can someone PLEASE teach your AV people the basics of framing? The camerawork is driving me nuts. Also, great lecture series.

[@bryankellsey7632]

another thing he has said was he regularly imagined himself riding a beam of light going forward in one direction at lightspeed?

[@bryankellsey7632]

think in terms of archimedes timer. if someone is able to pull that plug it will unleash lost knowledge at an instant to everyone

[@bryankellsey7632]

if anything its refresher to calc

[@bryankellsey7632]

i can only direct you but i cant give you too much. but i can most definetly point you to the right path in understanding

[@davidhand9721]

God, no, please not virtual particles crossing the event horizon... no, don't think about it that way, don't think of anything that way. The field outside the horizon is perturbed by the charged particle as it crosses the horizon. The photons that maintain the field in this state are _always_ outside the event horizon. You do not need to invoke mathematical faeries or ogres to understand this or anything else.

[@jojogaming1013]

all along the video, I was wondering why he says superconductivity. But if he is talking about NO resistance at all, He was talking about SUPRA-conductivity.n Which is a particular state obtained generally by making an object attain very low temperatures. Different materials become supra conductor at different temperatures. A "superconductor" is something that offers a "superior to normal" conductivity, NOT an absence of electrical resistance.

[@antoniolewis1016]

false.

[@victorbosh]

It can be true that some BH are charged, but no one can't know that from the outside. Particles too. So you can't build a shield to that splitting charged particles outside of it.

[@victorbosh]

1:06:40 to 1:08 is nonsense

[@bryankellsey7632]

i have this oppurtunity for leonard and maybe you

[@bryankellsey7632]

i xan and will

[@bryankellsey7632]

is it wierd that i understand all this with hs edu?

[@burunduchokbobo6773]

Never knew that Benedict Cumberbatch is good in physics

[@bryankellsey7632]

so answer my qyestions or at least think and forget bout a superconducter

[@bryankellsey7632]

its not that its relevant. its that we got side tracked from original theory

[@brendawilliams8062]

Who says it’s not relevant?

[@bryankellsey7632]

find me personally hartnoll if you want more infomartion

[@bryankellsey7632]

nah ive always been here

[@bryankellsey7632]

its proven that all this was known prior to 4k years ago. you physicists need to talk to archeologists too. but not within your schools

[@bryankellsey7632]

you are being restrained

[@rodsitvideos]

He can “do it, I mean the maths” but clearly doesnt understand it.

[@brendawilliams8062]

I disagree. He is covering a lot.

[@bryankellsey7632]

i understand your education. but ive done my own... i refuse to be schooled by those trying to assimalate humanity

[@bryankellsey7632]

yet in their eyes im a nobody becuase i didnt go to college. yet im fully protected by united states navy airforce and dod. at 60 levels above any president. yet i live poorly but i live fully protected

[@bryankellsey7632]

marhematecally... but ok sherlock.... still alll of it omes right back to geometry

[@palfers1]

There were a whole bunch of things this guy said that were just flat wrong. I don't understand how he can be a physics professor, unless he tried too hard to "popularise" the message.

[@metatron5199]

What specifically do you have a problem with? You do realize this was a non technical talk for laymen, on a subject that is experimental.

[@Oners82]

Whatever you do, don't give any examples will you...

[@brendawilliams8062]

@@metatron5199 a good physics teacher includes experiments. They live for experimental evidence. Don’t knock persons that exhibit knowledge.