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Lecture 1 | String Theory and M-Theory 

Stanford
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Help us caption and translate this video on Amara.org: www.amara.org/en/v/BAtM/
(September 20, 2010) Leonard Susskind gives a lecture on the string theory and particle physics. He is a world renown theoretical physicist and uses graphs to help demonstrate the theories he is presenting.
String theory (with its close relative, M-theory) is the basis for the most ambitious theories of the physical world. It has profoundly influenced our understanding of gravity, cosmology, and particle physics. In this course we will develop the basic theoretical and mathematical ideas, including the string-theoretic origin of gravity, the theory of extra dimensions of space, the connection between strings and black holes, the "landscape" of string theory, and the holographic principle.
This course was originally presented in Stanford's Continuing Studies program.
Stanford University:
www.stanford.edu/
Stanford Continuing Studies Program:
csp.stanford.edu/
Stanford University Channel on RU-vid:
/ stanford

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25 июн 2024

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Комментарии : 2 тыс.   
@vecter
@vecter 3 года назад
This is surprisingly accessible for anyone with a basic understanding of calculus and introductory physics. Susskind is an expert expositor.
@silent_traveller7
@silent_traveller7 4 года назад
Father of string theory teaching string theory for free for all the world. Imagine if Einstein taught GR or Newton Classical mechanics, we are living in golden era.
@slyy4096
@slyy4096 3 года назад
But, i'm not good at humans, but i see, he teaches something he wanted to understand but got old before that.
@ezbo1883
@ezbo1883 3 года назад
I watched 3 full lecture series on entirely different branches of science that i think even the actual Stanford students couldn't have attended to at the university :) The technology of ages has been here for a while and it's truly remarkable when institutions as significant as Stanford use it to share their value with the world, seemingly free of monetary shackles and deceit. I can't imagine a scientist just sharing their knowledge and findings globally and free of charge in the monetary society we live in, currently it's only institutions that would do it.
@rbr1170
@rbr1170 3 года назад
Newton's personality and pride will probably not let him do that. Einstein will happily do this. However, Newton will probably release a cryptic diss track against Leibniz.
@justbeconfidentbro1286
@justbeconfidentbro1286 3 года назад
He's hardly the father of string theory.
@saskoilersfan
@saskoilersfan 3 года назад
Newton's law applied to hollow earth proves the sun is earth's heated core...
@connorarmstrong9998
@connorarmstrong9998 7 лет назад
At 1:11:00 he gets really proud of himself for discovering the connection between classical and relativistic energy of a particle that made me happy lol
@TheTrocek
@TheTrocek 4 года назад
And the brave student puts him a little down in just the same sentence ... with q like - there should be some c2 on the board ... :D that just might show what's more important to those guys - person vs knowledge at the moment :D
@TheTrocek
@TheTrocek 4 года назад
​@Isomorphic :) You almost got my point - didn't you ;)
@danielli9304
@danielli9304 2 года назад
@@TheTrocek hhhhhhhhh
@emersonrocky8724
@emersonrocky8724 2 года назад
I know im asking randomly but does someone know of a tool to log back into an instagram account?? I somehow lost the password. I love any tips you can offer me
@thaddeusabram5855
@thaddeusabram5855 2 года назад
@Emerson Rocky Instablaster =)
@entropyman2
@entropyman2 11 лет назад
I have had dreams of sitting in a University class room learning Astrophysics and Quantum Mechanics/String Theory from one of the Masters! Watching these videos are the next best thing possible for now. This is like a free education for us poor citizens that missed out on the chance to experience and be part of something bigger than oneself. Thanks for the video classes ... I love this stuff, ... it's in my blood!
@bbsonjohn
@bbsonjohn 12 лет назад
70 year old. Healthy, clear-minded. I wish I will be as him when I get old.
@whirled_peas
@whirled_peas 3 года назад
Can't believe people need to be told this but, stay the fuck away from weed, THC is proven to cause early onset dementia.
@biblebot3947
@biblebot3947 3 года назад
@@whirled_peas what?
@kekuleonitro
@kekuleonitro 2 года назад
Indeed
@jzeerod
@jzeerod 2 года назад
IF not when
@fyr3st0rm65
@fyr3st0rm65 2 года назад
I dunno, he seems to be mixing up his P's and F's today. :P
@PatrickEngSU
@PatrickEngSU 9 лет назад
Hilarious: there are loads of comments complaining about math or downplaying math in favor of conceptual and intuitive understanding. None of these people have ever taken a real quantum mechanics class where absolutely nothing works the way you'd expect it to and math is the only thing you have- or if you're like me, the only thing you'll ever have to interpret and understand the quantum world.
@morganjo2002
@morganjo2002 8 лет назад
Alex Scholtes I agree and might add as an example of this syndrome that a lot of people think the probability thing is the outcome of something like a billiard ball table belonging to or manipulated by hidden beings - so-called substrate theories to explain away the fact that non-deterministic ( or seemingly random ) outcomes of an experiment is all there is , it's not like a bell curve of class marks or student birthdays that are a function of cause-and-effect of macroscopic objects including people and the latter , or some of them , don't understand that probability is all you get and there is no further consideration for a lot of quantum physics , the probability of an outcome such as where the photon is going to land on the screen before coffee break is all you get . . . I am not much of a mathematician but find it frustrating to try to explain this to the people around me .
@jibran8410
@jibran8410 5 лет назад
@@hawkeye2958 Hes not saying that , what hes trying to refer to is that if you dont know the mathematics hes using to Express the ideas you most likely will not understand anything. At such level observation becomes moot and mathematics is all we have to observe reality and extend it to something beyond what we can imagine
@TheCorrectionist1984
@TheCorrectionist1984 5 лет назад
So true. Quantum mechanics is almost pointless to try and understand without playing with the equations. And that's why it's so abused by the Deepak Chopras of the world.
@barrykendrick3146
@barrykendrick3146 4 года назад
+@@TheCorrectionist1984 Einstein did believe that eventually a meaningful model would be found.
@xvxvvv8924
@xvxvvv8924 4 года назад
@@morganjo2002 I need your help.
@jn3750
@jn3750 4 года назад
He's one of the main guys inventing this theory!
@joabrosenberg2961
@joabrosenberg2961 3 года назад
Universal Regge slope; Meson-Meson scattering 11:00; World sheets 31:30; Relativity and strings 35:30; Light cone frame 43:00; Physics of strings 1:00:00; String tension 1:20:00; Fluxoid 1:33:00
@thisistoomucheffort
@thisistoomucheffort Год назад
MVP
@petergreen5337
@petergreen5337 4 месяца назад
❤thank you
@Talleyhoooo
@Talleyhoooo 9 лет назад
Wow, Susskind is such a great lecturer, I'm surprised I was even able to follow! He's excellent at explaining the material.
@gilian2587
@gilian2587 5 лет назад
He's a fantastic writer, as well. Some physics authors try to impress you with their brilliance by making their books as formal, and obscurantist as possible. Texts written by authors like this are nearly worthless to teach yourself a subject with. Susskind's books are different; he wins you over with humor and suggests not to perceive the equations like mystifying cuneiform; but just as simple notation that anyone can learn and understand who cares enough to do so.
@gilles466
@gilles466 2 года назад
*SUSS*
@SpaceMilk07
@SpaceMilk07 10 лет назад
I am glad they have these free lectures on youtube, was very informing.
@kathyyoung1774
@kathyyoung1774 5 лет назад
Space Milk No kidding. I think nearly everything I learned in college is now available on RU-vid. Awesome.
@BradWatsonMiami
@BradWatsonMiami 4 года назад
Superstring theory: 6 dimensions hyperspace + 4 common dimensions = 10 dimensions spacetime or Supergravity theory & M-theory: 7D hs + 4D = 11D st Unified Strings 21 or 19 Dimensions & Aspects of Spacetime - Physics’ Theory of Everything: Superstring & M-theory + time analysis providing a very simple symmetry breaking 3 dimensions regular space + 7 dimensions hyperspace + 7 aspects regular time + 4 aspects hypertime = 21 dimensions & aspects of spacetime or 3D rs + 6D hs + 6A rt + 4A ht = 19D&A st (engineerable, e.g. Planet Nestor) 12 Dimensional Aspects of Time Eternal (DATE): 6 or 7 aspects of regular time: beginning, end, past, present, future, void?, a constant - speed-of-light 4 aspects of hypertime: fast-forward, reverse, pause/stop, before beginning & after end of Universe 12. imaginary time. Unified Strings 21 or 19 falls under the umbrella of GOD=7_4 or FOD=6_4 (on Planet Nestor); FIG=6|7 Bible & Buddha Code - Design Worlds Theory - The BIG TOE! See GOD704.fandom.com . These are Seals #2 & 3 of the "7 Seals" revealed as 'Beyond Einstein Theories'; see 7seals.blogspot.com . This has triggered The Apocalypse/ Revelation which is NOT the 'end of the world' - it's the return of the Christ/Albert Einstein reincarnated.
@nuttshellman
@nuttshellman 3 года назад
@@kathyyoung1774 y666676y77766yt7yy6yy7677y766766766y667yy6t6766y7y7y67yy666y66yy66y6y6yy6yyyyy667yy6yy6y6y76y6yy6y66yyyyyyyyyy6yyyyyyyyyyyyy6yyyyyy6yy66yyyyy
@nuttshellman
@nuttshellman 3 года назад
XOXO zzuuuuzxxzxzuu
@nuttshellman
@nuttshellman 3 года назад
Zzy
@brownah
@brownah 2 года назад
This nigga been putting me to sleep on restless nights for a decade now. Thank you.
@bradhayes8294
@bradhayes8294 3 месяца назад
I'm not sure why it was necessary to use the "n" word here?
@Aman-tf8bt
@Aman-tf8bt 5 лет назад
He is such a patient person ,he is calm and cheerful to teach with same patience and enthusiasm whether it's classical mechanics or string theory . Thanks a lot sir for your valuable lectures which will surely motivate more of us to physics and understand nature. I don't have words to describe your remarkable role as a very good physics teacher☺️☺️
@12magicKid12
@12magicKid12 13 лет назад
It's incredible that such an intellectual powerhouse is contained in such a seemingly approachable person.
@ImranKhan-ls4fe
@ImranKhan-ls4fe 12 лет назад
I am from Pakistan. I belong to a village remotely located and cut from alot of things happening in the world. I graduated from a college in a little town beside. In this college Experiments are never even thought of and theories that are taught are only famous ones likes of Newton's and Einstine but Student just dont know about the string theory, Parallel universes and other amazing works in Physics nowadays. I learned alot from Susskind, Michio Kaku, Hawking and other professors. Thanks to all
@ArchYeomans
@ArchYeomans 3 года назад
Professor Leonard is a treasure.
@keaqan
@keaqan 4 года назад
Power move: study using youtube first, then go to college and make an A because you already took the class
@fernandovalner
@fernandovalner 4 года назад
i think the inverse works better
@keaqan
@keaqan 4 года назад
Fernando Valner imagine how much easier you calculus class would be if u already knew calculus
@AbirInsights
@AbirInsights 3 года назад
@@Brad-qw1te I hope you were joking, nothing can replace college
@ParanormalInception
@ParanormalInception 3 года назад
@@fernandovalner how so lol. if he fail;s its a waste of money.
@ionuttoma3782
@ionuttoma3782 3 года назад
Fimeri
@panagiotiskotsaris1627
@panagiotiskotsaris1627 6 лет назад
its 3am and im watching a lecture on string theory
@ultrahapoel99
@ultrahapoel99 5 лет назад
trust me you are not the only one and not the last who done that.
@Mr.Nichan
@Mr.Nichan 5 лет назад
It's 4:00 am and I'm watching a lecture on string theory.
@callumalexander6409
@callumalexander6409 5 лет назад
same
@yasserbibi8095
@yasserbibi8095 5 лет назад
me rn
@peasant12345
@peasant12345 4 года назад
good luck with tomorrow final
@LovingLightFromCeci
@LovingLightFromCeci 13 лет назад
Thank you to all of you dear folks at Stanford University who have made these lovely lectures available to us all! Wonderful! Expressing thoughts on our collectively perceived reality in mathematical language offers all of us a fresh way of experiencing & enjoying life. Thank you so very much. I will enjoy this entire series! Bright blessings & warmest regards...Ceci
@garymcallister4228
@garymcallister4228 9 лет назад
1/2 million views for a lecture on String theory!
@nmarbletoe8210
@nmarbletoe8210 8 лет назад
+Gary McAllister Everyone who likes youtube cats by extension likes string :?>
@25aces
@25aces 8 лет назад
It gives me hope in society.
@tommasotiberi5666
@tommasotiberi5666 8 лет назад
+Gary McAllister Apart from this particular lecture being about String theory, i'm quite happy to know that so many people are interested in "fundamental" physics!
@Fransamsterdam
@Fransamsterdam 8 лет назад
How many of them would have noticed that it's about string theory if that was not mentioned in the title?
@tommasotiberi5666
@tommasotiberi5666 8 лет назад
well, that's a hard question lol does susskind in this video actually say that? i'd need to check i don't remember
@Recaustic
@Recaustic 3 месяца назад
Counter power move: listen to every lecture about string theory and cosmology to embed it into your memories, trip acid, and unlock the secrets of the entire universe.
@davidcase1762
@davidcase1762 10 лет назад
I am so grateful to receive these marvellous lectures - thank you
@thelichking1242
@thelichking1242 11 лет назад
Leonard Susskind is a genius pure and simple and an amazing man to work with too I may like to add
@yusufsalem809
@yusufsalem809 4 года назад
Lol this started playing in the background while I was transitioning into sleep with headphones in my ears...i had no idea what was going on but every time Susskind would start asking ‘so what is so and so...’ followed by some mathematical jargon my mind translated that to me sitting in a green open field with two students sitting also but far apart and i felt immense pressure to answer his questions...one of the most helpless experiences I’ve ever felt 😂😂😂😂😂
@07gingerkid
@07gingerkid 7 лет назад
Leonard Susskind you are a true genius and you are a great lecturer as well. Thanks for your work!
@aqwiz
@aqwiz 12 лет назад
Thus, the information contained in these lectures is an eye-opener if you truly understand any of it to begin with, and opens new avenues of thought to pursue.
@NothingMaster
@NothingMaster 12 лет назад
Let's just hope those students realize how incredibly privileged & lucky they are to have Leonard Susskind--not just one of the pioneers of String Theory, but also one of the most gifted Physics expositors/professors of all time--treating them to this exquisitely brilliant retrospective on the subject. It's truly amazing to bear witness to Susskind's natural ability to take a tough/nontrivial subject like String Theory & tenderize it to the point that even a physics infant can easily digest it!
@californiacajun4535
@californiacajun4535 2 года назад
Bruh r u mad whipped o something darn bro take it easy
@vishwaskulkarni9211
@vishwaskulkarni9211 2 года назад
They are not privileged they have earned it
@neonblack211
@neonblack211 Год назад
Agreed
@anthony64924
@anthony64924 2 года назад
This makes me want to go to college, I don’t have a clue what is going on but would love to learn with someone as passionate as this man!
@AlessioQ
@AlessioQ 4 года назад
I really love those kind of lecture on RU-vid!!!! This was really instructive
@crazygenx2539
@crazygenx2539 7 лет назад
Love this. Great physicists look for meaning in the terms of equations, and this guy does that.
@alberteinstein3078
@alberteinstein3078 5 лет назад
Mike before breaking bad lol
@sammarks9146
@sammarks9146 5 лет назад
Turns out both he and Walter were science teachers!
@marcux83
@marcux83 4 года назад
I'm the one who teaches!
@eliash.6142
@eliash.6142 4 года назад
Looks more like john malkovich tbh.
@davidrich27
@davidrich27 4 года назад
Fring Theory is the next lecture.
@pixelprincess9
@pixelprincess9 3 года назад
I don't think Mike was Jewish.
@KevinECahill
@KevinECahill 8 лет назад
Leonard Susskind is one of the greatest physicists of our time. Also one of the best lecturers and writers.
@andreizimin443
@andreizimin443 6 лет назад
So you knew all the time. Thanks for letting me find it out on my own! I'm truly grateful.
@crazygenx2539
@crazygenx2539 7 лет назад
I did my undergraduate where Susskind got his Ph.D. I'm having geek flashbacks.
@mexicanwootwoot
@mexicanwootwoot 4 года назад
Where is that?
@sagniksarkar1503
@sagniksarkar1503 4 года назад
@@mexicanwootwoot Cornell University .
@hoogmonster
@hoogmonster 4 года назад
I think this lecture has really helped me... I can now tie my shoelaces.
@Yasinaktimur
@Yasinaktimur 2 года назад
Thank you stanford. Nobody can talk about string theory with math on internet, only this source is findable also its best resource too. Also thanks to teacher for clean explanation.
@dr.ambiguous4913
@dr.ambiguous4913 5 лет назад
Some of this is surprisingly more intuitive than i thought it would be.
@GulGeeOfficial
@GulGeeOfficial 3 года назад
I was sleeping while listening songs and after I awake RU-vid is playing this theory on my phone😂 wtf
@jotagalvan
@jotagalvan 10 лет назад
I LOVE STANFORD.
@bobcrunch
@bobcrunch 10 лет назад
This guy is fantastic. His lectures on general relativity are superb. He can take the most complex science and math and make it understandable, even to n00bs, and yet are of substantial benefit to those with advanced mathematical knowledge. I can now read all the Wikipedia articles on general relativity and understand them pretty well.
@SaurabhSaket61234
@SaurabhSaket61234 4 года назад
I slept halfway during the lecture. In dream the same professor was teaching me same topic with Bill Gates overlooking from other bench. Freaky and yet it was the best lecture I ever had and I now understand a bit of string theory. Thank you professor.
@RickIsShalom
@RickIsShalom 11 лет назад
Many years ago I bought a set of Feynman lectures, which made no sense to me -- I have a neuroscience / psych background. Now the lectures came to life, and the diagrams have meaning. This is wonderful lecture, even if much of it is beyond my capability. Thanks to Stanford for being so generous with resources.
@JamesEIvoryIII
@JamesEIvoryIII Год назад
👍 Those “many years ago”, below the threshold of your conscious awareness, there was some information sorting taking place. Now affording you a better sense of correlating these complex and nuanced concepts together with what I think can be partly attributed to neuroplasticity. The mind, I don't have to tell you, is as amazing as it is mysterious. 💡
@Shingjanjie
@Shingjanjie 8 лет назад
It's like I've been accepted :')
@dariamashanova3739
@dariamashanova3739 8 лет назад
+Grace 夢幻專家 Same
@legendarylightyagamiimmanu1821
Did you get accepted ? By who or for what?
@ols47
@ols47 5 лет назад
@@legendarylightyagamiimmanu1821 to stanford
@atallguynh
@atallguynh 5 лет назад
Yeah, and then kicked out in short order when I couldn't keep up. 😉
@jaxonfreeze7882
@jaxonfreeze7882 4 года назад
aTallGuyNH, Hey me too!
@oudezhong9820
@oudezhong9820 11 лет назад
it really is something to learn string theory from someone who helped coming up with it... there's nothing like it thx for the vid
@caiduncan7633
@caiduncan7633 10 лет назад
Great lecture.. Leonard Susskind is really one of the greatest minds in this generation.
@smilinjack11
@smilinjack11 12 лет назад
For those interested in Dr Susskind's lectures, I found it easier to go to the list at the end of the Wikipedia article on Dr. Susskind. You will get a better sense of the whole series. These lectures were open to inerested non-students and the "class" included many older people. I would advise those interested to look at the listing I mentioned and go thru them in order, starting with Susskind's lecture on "Classical Mechanics" Ain't the internets great??
@ayanluthor6203
@ayanluthor6203 Год назад
9 years but still helping, thanks mate :) hope u r doing well
@Moronvideos1940
@Moronvideos1940 6 лет назад
I downloaded this Thank you professor Leonard ......
@andrea.dibiagio
@andrea.dibiagio 11 лет назад
This is priceless. Keep posting courses!
@MrGiuse72
@MrGiuse72 3 года назад
I watched it today and it was marvelous ! THANK YOU MIT THANK YOU PROF. SUSSKIND
@santeri-leinonen
@santeri-leinonen 11 лет назад
I just love the fact that I can learn about String and M-Theory from top professors online while still going to a perfectly normal high-school in Finland. Well there are bits of the maths that I don't fully grasp, but that might be due the fact that it's 3am... Hope to gain more motivation to study the basic physics even better to one day gain this level of understanding in particle physics. And hope this will boost the enjoyment of my possible upcoming field trip to CERN next spring!
@mandiraghosh7227
@mandiraghosh7227 3 года назад
Have u been to CERN?
@wojak6793
@wojak6793 Год назад
@@mandiraghosh7227 Not Swiss but I’ve been to Fermilab many times (my high school was actually founded by a Fermilab director so we have tons of connections with them) but I’d like to have a trip to CERN lol
@thegrandmuftiofwakanda
@thegrandmuftiofwakanda 8 лет назад
I love the internet.
@JackCodeKid
@JackCodeKid 8 лет назад
Instead of college
@stilekropfilms6610
@stilekropfilms6610 7 лет назад
billiepipersteeth I love your name
@thegrandmuftiofwakanda
@thegrandmuftiofwakanda 7 лет назад
Nhật Tuấn I went to college, but in terms of the raw theory I don't see the point anymore. The texts and other information are widely available, and free.
@jaxonfreeze7882
@jaxonfreeze7882 4 года назад
Same, you can find anything
@GamerTheTurtle
@GamerTheTurtle 4 года назад
this whole lecture is one huge humble brag
@Evan2718281828
@Evan2718281828 4 года назад
1:15:00 the value of dX in dX/d_sigma is the length of the string stretched out uniformly because it's at rest when it's stretched out, as opposed to vibrating with energy.
@joaopedroaguiarformigamato3557
@joaopedroaguiarformigamato3557 3 года назад
Im struggling on mechanics and studying string theory 1010 would recommend
@Constantinesis
@Constantinesis 9 лет назад
Mathematics are so interesting when you don`t need to actually memorize 100 formulas each semester
@SickMetalAddict
@SickMetalAddict 9 лет назад
Constantin Eugen Cozma This is the problem with schools. When you actually become a physicist, you could literally put all of the formulas as a cheat sheet, and just be able to know which one to use in which situation, then use it. Eventually as you use it often, you memorize the ones that are the most commonly used, but there is nothing wrong with not memorizing them.
@mariorpg11
@mariorpg11 9 лет назад
SickMetalAddict Fortunately schools (at least in Germany) are changing more towards not memorizing formulas. We got a collection of formulas to use in our tests.
@razzmaster02
@razzmaster02 9 лет назад
SickMetalAddict People don't realize that solving problems gets easier when you don't concentrate on memorizing formulas and plugging in numbers, because often times the difficulty of the problem increases drastically as well...you have to have a full grasp of all the formulas and methods you use in the process of solving a problem, and for the most part if this is accomplished you will have very nearly memorized the equation, or know how to reproduce it. Especially in intro level physics classes. In higher level classes, most upper level teachers (at least at the undergraduate level) allow cheat sheets, but of course this is the least of your problems in an advanced electrodynamics course...
@benwaful
@benwaful 9 лет назад
Constantin Eugen Cozma the thing is that once you start understanding physics you realize that all these equations can be derived from a handful. And with experience, more and more of those derivations become standard and straightforward. From now on, it is better for schools to forbid cheat sheets as most of those "100 formulas" can be found back easily. Example: trigonometry: just by drawing a circle and using exp(i a)=cos(a)+i sin(a), you can derive all the trigonometric equations most students in school will ever need. The whole point of forcinng students to "memorize" those "formulas", is to challenge them into realising that there is always another way in math/physics. Math/Phys is not history or geography people!
@hawkeye2958
@hawkeye2958 8 лет назад
You don't have to memorize formulas to be good at it. But that ability does help.
@Oners82
@Oners82 5 лет назад
A free university level course on String Theory and some people genuinely give it the thumbs down?! Idiots, this is great stuff!
@Reav3rz
@Reav3rz 11 лет назад
Thank you so much for uploading all of those :D Very imfomative , and Leonard kicks ass as always.
@FullMoongrn
@FullMoongrn 10 лет назад
well said. This touches me too, cause many people didn't have the chance to get education do to different reasons. When we watch this, the only thing that cames to my mind is wishing going back in time and have the opportunity to go to school again.
@fulmarmusic1413
@fulmarmusic1413 4 года назад
I feel like a dog listening to classical music. I like it when "But, then something amazing!".
@sasukesuite1
@sasukesuite1 11 лет назад
This really helps a lot with my DP Extended Essay topic. Very informative.
@itsiwhatitsi
@itsiwhatitsi 3 года назад
It seems he understand so good things that for him is all so simple.. all the symbols and formulas are natural and clear like water
@KoLecnac
@KoLecnac 6 лет назад
I love these! Could we get a prerequisites list, please? I'm pausing every few seconds to look up mesons, gluons, pions, etc.
@mastershooter64
@mastershooter64 2 года назад
prerequisites for string theory is GR and QFT
@yteicosf1103
@yteicosf1103 2 года назад
now plz don't tell us that you have to look up GR and QFT.
@davidpalmer9802
@davidpalmer9802 Год назад
Prerequisites include intro to physics
@vpruli6058
@vpruli6058 2 года назад
It’s 2:17 am and here I am trying to understand something way above me
@ZoeTheCat
@ZoeTheCat 11 лет назад
In general, you will need some Group Theory, Lie Algebra, differential Geometry (Tensors & vector bundle concepts), K-Theory, Algebraic Topology & Non-commutative geometries, gauge theories, ads/CFT correspondence and much more. It is a daunting journey. While tackling these topics, you may find that you need further sub-tools. I'd recommend mastering SR, GR, QED, QCD, Standard Model. These topics which are well documented give further intuitions.
@buckeyeguy81able
@buckeyeguy81able 11 лет назад
Thank you for posting this. I never went to school and I regret it. So I soak up as much as possible
@GregBernhardt
@GregBernhardt 6 лет назад
This is the beginning of a series that gives an introduction to perturbative quantum field theory (pQFT) on Lorentzian spacetime backgrounds in its rigorous formulation as locally covariant perturbative algebraic quantum field theory. Reference www.physicsforums.com/insights/paqft-idea-references/
@mohammadwasilliterate8037
@mohammadwasilliterate8037 4 года назад
Do you even earn money in the real world or only at a university lecturing to people that need safe spaces?
@SonLe-mk4sq
@SonLe-mk4sq 7 лет назад
Finally.. FINALLY! The best ASMR video on RU-vid!
@lukamtc9188
@lukamtc9188 6 месяцев назад
this is the 2nd guy at Stanford blessing me with knowledge way out of my league
@Rob3P
@Rob3P 9 лет назад
Is there another series of String Theory lectures done with white chalk on a blackboard?
@rodrigosalasolivares9921
@rodrigosalasolivares9921 5 лет назад
ted talk, much simpler btw
@gbiota1
@gbiota1 9 лет назад
I'm not trying to sound greedy, but the chances are good this video and others like it will wind up educating a lot more people than the 80 or so that might be in a given class room. I think that it could go even further if Susskind or a graduate student at Stanford would append a few questions to the end of each lecture to make sure the core ideas were absorbed. I have my own calculus books, I have my own mechanics books, but the chances are even if I had my own string theory book, it wouldn't contain any questions.
6 лет назад
80 ? christ how big is your classes ?
@afx935
@afx935 6 лет назад
My Modern Physics class was 110. Largest was a history class with 150.
@34_atharvamujumale57
@34_atharvamujumale57 6 лет назад
gbiota1 I
@gilian2587
@gilian2587 5 лет назад
I had a quantum mechanics class with 2 students (myself included). Not private education... just a *VERY* small physics department.
@FidelAngelOrozco
@FidelAngelOrozco 11 лет назад
I have enjoyed the class. My congratulations to Stanford University for this good idea and to mr L Susskind for this string theory point of view. I will look for further Susskind's videos. §tring Theory is a fascinating subject. Thanks a lot.
@TheLycanStrain
@TheLycanStrain 11 лет назад
I love Leonard Susskind. The Cosmic Landscape was a very interesting book. I really did like his explanation of the Holographic Principle (using the Library of Alexandria if I remember correctly). I think that by using things we can imagine in our mind, he can better explain it to non-technical types. "The information content in a given box is equal to the amount of information that can fit on the box's walls." That just blows my mind. A new way to look at the Universe.
@GoldSlidePark
@GoldSlidePark 8 лет назад
Does anyone else use videos like these to fall asleep?
@osemudiame123
@osemudiame123 7 лет назад
yeah occasionally. get educated and get a good night sleep while having math related dreams.
@nexuspcsolution6242
@nexuspcsolution6242 7 лет назад
yes a fool like you do such things who can use technology but doesnt have the talent to understand where all the science that we use today as technology comes from
@Ari-jm6xx
@Ari-jm6xx 7 лет назад
Yes! Oddly relaxing.
@sjorsheefer7327
@sjorsheefer7327 7 лет назад
Haha I thought I was the only one!
@nerdio1
@nerdio1 7 лет назад
every night
@roommyneri5390
@roommyneri5390 5 лет назад
Thankyou, this really helped my insomnia
@arunavachakraborty4565
@arunavachakraborty4565 4 года назад
🤣🤣🤣🤣🤣so funny I love you
@jayceonetrick3101
@jayceonetrick3101 11 лет назад
bro, i am up until 4;00 just to watch these lectures, i am 9 and i understand everything dude.... My brother teaches me everything before I even hear this lecture
@insanidadeEspelhada
@insanidadeEspelhada 7 лет назад
Thank you for this lecture !
@Dorkus89Malorkus
@Dorkus89Malorkus 12 лет назад
Hell yeah I'm transferring to Stanford this summer, see you soon Leo!
@ohillnam4714
@ohillnam4714 3 года назад
Hey how is your life after 9 years? Have you got married to your girlfriend or got separated! And what is changed in your life after those 9 years... Please answer???
@meddelhed
@meddelhed 11 лет назад
Cool Story, bro. I'm 3 and I've coded parts of the Battlefield 3-engine.
@AngeBleudeLou
@AngeBleudeLou 11 лет назад
Wow. After googling quite a few basic terms of what he was talking about, (I never took a college level physics course) I am hooked. I wish now that I had, but thanks to poster, and Google, I find that it wasn't necessary. I'm looking forward to the next videos! Thank you for opting!
@tim57243
@tim57243 5 месяцев назад
I correctly recognized Susskind from the back of his head in the thumbnail. I really like these lectures he publishes.
@WBradJazz
@WBradJazz 9 лет назад
I love Susskind
@estamos_aqui_para_aprender
@estamos_aqui_para_aprender 6 лет назад
So, marry him
@salvadorfawkes4141
@salvadorfawkes4141 8 лет назад
Does that mean E^2=potential energy x c^4 ?
@aryan.aristocrat
@aryan.aristocrat 2 года назад
i am 17 a junior in high school watching this lecture bc my school won’t let me take it in person so I decided to take it by myself , don’t let ppl prolong your education! They want you to be a worker not a thinker
@kalijasin
@kalijasin 6 лет назад
I like his explaining. Very clear.
@griffinfitzpatrick
@griffinfitzpatrick 4 года назад
12:35 he’s saying Pi-mesons, is it the same Hadron as Pions?
@marcusrosales3344
@marcusrosales3344 4 года назад
Yes, a Hadron is just a baryon or a meson. These are defined by their quark content: 3 or 2, respectively.
@griffinfitzpatrick
@griffinfitzpatrick 4 года назад
Marcus Rosales thank you sir
@carloscastanheiro2933
@carloscastanheiro2933 4 года назад
This is so cool. Im getting lessons from Stanford all the way in Portugal, gotta love technology lol. Wish I won a scholarship to study in the USA.
@buckryan1173
@buckryan1173 4 года назад
Oi, Bom Dia! (I'm learning to speak Portuguese, as a second language)
@carloscastanheiro2933
@carloscastanheiro2933 4 года назад
Cool, it's hard though, especially all the verbs, it's like French.
@garywpearson1955
@garywpearson1955 5 лет назад
A great public service! Thank you professor (and CalTech) for making these lectures readily available to the public. (There's only so far the Brian Green type explanation, in which none of the actual background on String Theory is presented, will get you.)
@jefferytoledo2505
@jefferytoledo2505 5 лет назад
It's Stanford, not Caltech :p
@garywpearson1955
@garywpearson1955 5 лет назад
Hah! Of course, I knew that. ;-)
@jefferytoledo2505
@jefferytoledo2505 5 лет назад
@@garywpearson1955 If so, 10/10 for the subtle troll :p
@garywpearson1955
@garywpearson1955 5 лет назад
What do billy goats taste like, anyway? :-D
@mattpires607
@mattpires607 2 года назад
“The graphs looked better so the mass is squared” as I researcher I relate to this on another level
@ronjose51
@ronjose51 11 лет назад
This is amazing. I wish I had a greater knowledge of this.
@harshprajapati9251
@harshprajapati9251 5 лет назад
Me: listening songs RU-vid : here a lecture on string theory :x
@glutinousmaximus
@glutinousmaximus 7 лет назад
Excellent lecture - Thanks!
@williamotule
@williamotule 9 лет назад
Great Intro! Enlightening
@thomasolson7447
@thomasolson7447 4 года назад
I opened my browser and this was on. It must have been going all night long. Maybe youtube is string theory.
@bmoneybby
@bmoneybby 5 лет назад
I hear is voice exactly when reading his The Theoretical Minimum series haha
@elisabethcuriel
@elisabethcuriel 2 года назад
This is wonderful. Sir, I am your biggest fan. Thank you for the videos.
@brainstormingsharing1309
@brainstormingsharing1309 3 года назад
Absolutely well done and definitely keep it up!!! 👍👍👍👍👍
@sananapee
@sananapee 11 лет назад
I wish I was smart enough to understand this. It's so intriguing!
@sarcasticstartrek7719
@sarcasticstartrek7719 Год назад
He's like the physics version of Mike Ermantraut.
@rusurveillancetaskforce
@rusurveillancetaskforce Год назад
Have an updoot for this genius comment, fellow redditor!!!
@79898325
@79898325 Год назад
Leave Leonard alone
@sarcasticstartrek7719
@sarcasticstartrek7719 Год назад
@@79898325 It was a compliment.
@corysteiner7353
@corysteiner7353 Год назад
THANK YOU i’ve been thinking this for so long
@sherlockholmeslives.1605
@sherlockholmeslives.1605 5 лет назад
I don't understand this but I think that this is 'Fantastic'!
@phpART
@phpART 9 лет назад
Mike?
@scienceforalll
@scienceforalll 7 лет назад
can anyone recommend a good string theory books
@izaaktehdinosaur7043
@izaaktehdinosaur7043 7 лет назад
Joseph Polchinski has done a couple of good books on String Theory
@nishit7147
@nishit7147 5 лет назад
The Elegant Universe by Brian Greene.
@redrocket1770
@redrocket1770 5 лет назад
Try working out Zwiebach's Basic concepts of String Theory, which is a good introductory book to read and lays down a strong foundation. Afterwards you can go on to read Polchinski/Green Schwarz Witten/Peter West/ Becker Becker Schwarz/ Blumenhagen Lust Thiesen/Kiritsis and many other books which are at a more technical level.
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