A Brief History of Quantum Mechanics - with Sean Carroll

The mysterious world of quantum mechanics has mystified scientists for decades. But this mind-bending theory is the best explanation of reality that we have.

Sean’s book "Something Deeply Hidden" is available now - geni.us/jrBLV

Watch the Q\u0026A: kgkey.info/block/q6Zpf77UhdWa2Ho/video.html

Whether it’s Schrödinger's cat or the many worlds interpretation, the ideas quantum mechanics throws up about the reality we live in can seem incredibly strange and daunting.

In this talk, Sean walks you through the history of quantum discoveries, from Einstein and Bohr to the present day, guiding you through the most intriguing subject in science and explaining his own favourite theories along the way.

Sean M Carroll is a theoretical physicist, specialising in quantum mechanics, gravitation, cosmology, statistical mechanics, and foundations of physics, with occasional dabblings elsewhere. His official titles are Research Professor of Physics at Caltech and Research Professor at the Santa Fe Institute. He lives in Los Angeles with his wife, writer Jennifer Ouellette.

This talk was filmed in the Ri on 22 January 2020.

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Жорумдар 

  1. Mr T.

    Mr T.

    4 саат мурун

    31:40 - mind BLOWN! 🥳

  2. Malick Sadick

    Malick Sadick

    21 саат мурун

    what about the the five dimensiions

  3. Mike l

    Mike l

    Күн мурун

    Full BS!

  4. chris craven

    chris craven

    Күн мурун

    electrons is tangible, a charge is a state of reference or position, we can see electrons but measure where it goes, from point A to point B and Point A is in the same place as Point B, a circle, the same place but not at the same time.

  5. Wisconsin Gold Rush

    Wisconsin Gold Rush

    2 күн мурун

    Quantum Physics: The dreams that stuff is made of.

  6. Rika Sukenik

    Rika Sukenik

    2 күн мурун

    Amazing. Now I'm inspired to re-read Ted Chiang's short stories!

  7. Don Johnson

    Don Johnson

    2 күн мурун

    J

  8. wqe asd

    wqe asd

    2 күн мурун

    Reply with advancements to the theory, any proof which proves or disproves, what is presented here

  9. crystal life

    crystal life

    3 күн мурун

    Nepalese Life Matters!!! foreign people have devices inside my body and they are destroying my tonsils in the midst of corona.

  10. 1x_RJ_x1

    1x_RJ_x1

    3 күн мурун

    I had to take Chemistry in high school.

  11. Jolly Nox

    Jolly Nox

    4 күн мурун

    taste is feeling as a wave, help me prove it

  12. Nacho Medina

    Nacho Medina

    5 күн мурун

    There's another universe in which Sean betrays us all, and jump to the right side just for trolling...

  13. workoutfanatic787

    workoutfanatic787

    5 күн мурун

    thank you for posting these lectures online

  14. Caue Rodrigues

    Caue Rodrigues

    5 күн мурун

    It is very intriguing to see physicists disregarding the part that conciouness play in quantum mechanics. Physic evolved from philosophy, and today they are trying to avoid philosophy. To me it seems we are not playing with a full deck while we put limits to our wonder.

    • workoutfanatic787

      workoutfanatic787

      5 күн мурун

      also, the role of consciousness is diminished if you subscribe to decoherence - consciousness is the same as the environment, as explained by Carroll at 34:00

    • workoutfanatic787

      workoutfanatic787

      5 күн мурун

      the problem of consciousness is - where does it end? Human consciousness? Can only living objects be conscious? What about a rock? And finally, it’s not like consciousness is a discretely definable concept in the first place. The best philosophers and neuroscientists the world has to offer - they don’t even know where to start.

  15. Anil Aurora

    Anil Aurora

    6 күн мурун

    So essentially what is being proposed is that everything just exists. All possibilities. We just happen to choose/observe stuff by chance or randomly. Quite akin to the Indian philosophy wherein we are all parts of the greater big or Brahma or God (if you will) or Consciousness or Wave but are individuals at the same time. Interesting lecture. Thanks.

    • Sahil Negi

      Sahil Negi

      4 күн мурун

      That's not what he meant. Stop making false comparisons.

  16. Samuel Rubinstein

    Samuel Rubinstein

    7 күн мурун

    The tan pancreas probably burn because traffic concurringly pinch concerning a puzzling diploma. wistful, changeable asia

  17. Samuel Rubinstein

    Samuel Rubinstein

    7 күн мурун

    The closed plough histopathologically frighten because sk

  18. wulphstein

    wulphstein

    7 күн мурун

    Wave functions are describing expanding gravitons which expand at the speed of light, like a water ripple, to create spacetime geometry.

  19. mauro stocovaz

    mauro stocovaz

    7 күн мурун

    Consciousness created cause and effect to give birth to the cosmos, the universe and infinity. Fortunately, I have no doubts about this. Consciousness, knowing itself to be UNREACHABLE INDEFINIBLE INDECIFRABLE, has no choice but to MISTIFY. 16.06.2021 from mauro stocovaz La coscienza ha creato la causa ed effetto per fare nascere il cosmo l' universo e l' infinito Io per fortuna non ho in merito nessun dubbio. La coscienza sapendo d' essere IRRAGGIUNGIBILE INDEFINIBILE INDECIFRABILE non gli rimane che MISTIFICARE. 16.06.2021 da mauro stocovaz

  20. Aee Bee Cee

    Aee Bee Cee

    10 күн мурун

    Totally love this channel

  21. June VanDerMark

    June VanDerMark

    10 күн мурун

    From my perspective, we have two choices. We can either believe that the universe was created by an entity that designed suffering as part of its plan ... or, we can believe (as did Stephen Hawking, before he died) that the universe always existed, and will always exist ... no plan involved. I prefer the second choice.

  22. Fixed Cross

    Fixed Cross

    10 күн мурун

    I explained QM, to the best of my abilities, in terms of Kabbalah: axIN50sTCRQ

  23. wjb40

    wjb40

    11 күн мурун

    Parallel universes? P-shaw! That's a lot of matter. Where is it all coming from? Infinite universes being created every second? Nope, not buying it.

  24. wjb40

    wjb40

    11 күн мурун

    Sleeping gas for a cat experiment? Cats are asleep 90% of the time. It HAS to be a killing gas!

  25. anonymous

    anonymous

    12 күн мурун

    'You r a great great audience' -probably sean

  26. Steve Pople

    Steve Pople

    12 күн мурун

    Is a Higgs Boson a single particle or a pair of wave functions that only separate when they lose enough energy to do so ?

  27. D-Red

    D-Red

    12 күн мурун

    so... its 4am and am doing my final while listening to this....

  28. never again

    never again

    12 күн мурун

    Great presentational skills, enjoyed this very much! Thank you!

  29. Kishan' Sharma'

    Kishan' Sharma'

    13 күн мурун

    so actually enjoyed the 3rd part of the talk..why ? coz it resembles with my interpretation but... there's even more general assumption in my version...what it does? it takes into account dark universe 😁(yeah really)

  30. Freddie Guillemard

    Freddie Guillemard

    14 күн мурун

    Brilliant talk. Really enjoyable and I am thirsting for more. How about your book?

  31. richard halling

    richard halling

    14 күн мурун

    I don't like the many worlds idea it's one world that exists from one micro second to the next, exerything having moved in some way and is not the same as before

  32. Shanice Garner

    Shanice Garner

    14 күн мурун

    I meant 4

  33. Shanice Garner

    Shanice Garner

    14 күн мурун

    Just divide by two

  34. Shanice Garner

    Shanice Garner

    14 күн мурун

    And is the mass of the universe

  35. Shanice Garner

    Shanice Garner

    14 күн мурун

    Irrelevant but I think the last digit of pi is 3

  36. Thomas Hernandez

    Thomas Hernandez

    14 күн мурун

    I turn 30 this year... if I spend the next 30 years studying this stuff, maybe I will understand half of this video.

  37. Dee B

    Dee B

    14 күн мурун

    Sean just singlehandedly created a parallel universe

  38. unquestionable

    unquestionable

    14 күн мурун

    The brief lecture on Quantum Mechanics is 56 minutes. Imagine a long one…

    • Robert Hand

      Robert Hand

      2 күн мурун

      @MOE SEDWAY ⅛

    • MOE SEDWAY

      MOE SEDWAY

      4 күн мурун

      🇮🇪🇮🇪🇮🇪🇮🇪🇮🇪🇮🇪🍺👴🏻☘️@(¿;)@ VOTE FOR VILNA GOAN IN 2024

  39. Kako Rod

    Kako Rod

    15 күн мурун

    Hi, i`m watching from Brazil. The superposition phenomenon of quantum mechanics is fantastic

  40. Richard mulinix

    Richard mulinix

    17 күн мурун

    Could it be that the excited adams that we see are just adams in time warp?

  41. Gadesht Mounigama

    Gadesht Mounigama

    17 күн мурун

    give it a name and they will feel safe.

  42. nancy joseph

    nancy joseph

    17 күн мурун

    *Sean Cowell is a great Theoratical Physicist!* 🎉💥

  43. C V

    C V

    18 күн мурун

    The machinery of matter, it must be "distorting space" via some quantum mechanism, kinetic energy and the observance of a particle moving in a "direction", seems to be the increased entanglement with other quantum matter, classicallly called velocity which is associated with a mass and containing kinetic energy. Matter is energiezed via a "kinetic" quantum mechanism and this mechanism distorts space throught strengthening and weaking its quantum entanglements with matter around it. It distorts space up untill a certain point when it transfers/converts energy to other quantum matter or converts the energy through other matter into a new quantum energy or quantum energy storage such as classically described gravity potential or chemical potential.

  44. Charles Henry McGregor

    Charles Henry McGregor

    18 күн мурун

    The whole science is an inaccurate tangent, based on false observations of an experiment.

  45. Soulthou Uthou

    Soulthou Uthou

    19 күн мурун

    Sudhar kein important Hua Hoga !🙏🗣

  46. Robocop2015

    Robocop2015

    19 күн мурун

    Great lecture!

  47. Stephen Martin

    Stephen Martin

    19 күн мурун

    I am the embodiment of Schrodinger's cat: I am superpositionally both glad that I watched this video and not glad. Glad because this is a window into the truth about reality. Not glad because I suspect that the closer one is to the truth in quantum mechanics, the closer one is to going completely insane.

  48. Max Max

    Max Max

    19 күн мурун

    His voice is so amazing; I literally am hearing every word clearly.

  49. Fred Garvin

    Fred Garvin

    19 күн мурун

    99 percent of the viewers couldnt pass a Physics 101 course. But can understand Physics 490 level concepts. The internet FTW

  50. Burt Chabot

    Burt Chabot

    19 күн мурун

    Has Daniel Kahneman (Thinking Fast and Slow) taken a look at this “Is a wave till we look at it” phenomenon.

  51. 12388696

    12388696

    20 күн мурун

    Multiverse is a joke, period.

    • Limitless.

      Limitless.

      19 күн мурун

      @Fred Garvin I just want to know why this person thinks the multiverse is a joke.

    • Fred Garvin

      Fred Garvin

      19 күн мурун

      @Limitless. You go first.

    • Limitless.

      Limitless.

      19 күн мурун

      Elaborate

  52. Guillaume Nobody

    Guillaume Nobody

    20 күн мурун

    Great lecture, many thanks. I hope you can present the results/conclusions of your entanglement theory soon

  53. Resin Lung

    Resin Lung

    21 күн мурун

    I am the luckiest me. I try to live my life in such a way so as to be able to answer the question, “why you?” by asking “why not me?”, so than all that is required is for me to believe I am. And it became so.

  54. Sedjwin

    Sedjwin

    22 күн мурун

    Try to explain this with time reversed: the particle evaporates into a field. All particles that 'were never observed' just carry on being speculative in existence as a wave and unpredictable. If it wasn't for our simple minds thinking time only moves forwards, we would understand this. This also conserves the notion of simulation theory and allows a limit on the data. Its not in a 'super position', it simply doesn't exist until it is observed or first- construed in thought.

  55. 221 Manavraj

    221 Manavraj

    22 күн мурун

    Thank you very much ...I want to be quantum physicist and I will surely appreciate the idea that our world is purely quantum mechanical ....that we must find out!!!

  56. Grahame Campbell

    Grahame Campbell

    22 күн мурун

    Anyone who did not understand electrons before watching this video is probably a genius.

  57. lindsey williams

    lindsey williams

    23 күн мурун

    The sick tachometer optically vanish because separated intriguinly concern near a pretty fiber. overconfident, mature cost

    • Grahame Campbell

      Grahame Campbell

      22 күн мурун

      That's easy for you to say.

  58. John Lawrence

    John Lawrence

    23 күн мурун

    They are the ones who, when you take your car in for a routine service, diligently discover you need new break linings, replacement clutch/ gearbox, distributor, and rear suspension.

  59. gtr mjk

    gtr mjk

    24 күн мурун

    The zippy romania ostensibly offend because protest energetically mix outside a tacky stepson. dry, omniscient letter

  60. Upward Dog Yoga

    Upward Dog Yoga

    24 күн мурун

    💜💜💜💜💜💜💜 very well explained. Buying the book

  61. Lee Bromley

    Lee Bromley

    24 күн мурун

    Congratulations Sean. You have it right. Bohm's model remains fatalistic, in having "my conscious experience" on one hand, and that set of forces which we could call "fate" on the other. Your approach allows conscious interaction directly with the Boson Field. When a guru meditates, he is interacting directly with the Boson field through direct experience. Any of you who enjoys Sean's relentless intellect, know that what he is touching with his mind is at the very limit of human cognition. He is a truly enlightened individual, and will prove to be a great teacher to those who listen.

    • Fred Garvin

      Fred Garvin

      19 күн мурун

      Um what?

  62. Modular Drops

    Modular Drops

    24 күн мурун

    Lots of credit to Prof. Carrol but my ears are somehow allergic to his tone of voice 😕

  63. Esa Hämäläinen

    Esa Hämäläinen

    24 күн мурун

    Very entertaining, but unfortunately there was not much new insight - yet. But he illustrated the history of interpreting quantum mechanics quite well.

    • Fred Garvin

      Fred Garvin

      19 күн мурун

      Insight into quantum mechanics really is only understood by physicists. Moreover, those with PHD high level maths

  64. Jeffry Phillips Burns

    Jeffry Phillips Burns

    25 күн мурун

    The most basic and obvious objection to the “many worlds interpretation” is not addressed here. The objection is, in fact, implicit in the terminology by which Carroll names the thing he advocates: it’s an “interpretation”, not a theory; it makes no prediction by which it could, even hypothetically, be tested. David Deutsch, in his book “The Fabric of Reality” and in at least one lecture of Deutsch’s I’ve seen, asserts that the “double slit” experiment is evidence, or even proof, that the “many worlds” conjecture is correct, when obviously it could be no such thing since the “double slit” experiment preceded the “many worlds” conjecture by decades. The “many worlds” conjecture is, rather, a proposed explanation for the “double slit” experiment which itself must be subjected to further experiment if it is to be seriously accepted. If the "many worlds" or parallel universes subsumed by the "multiverse" (as Deutsch calls it) can never interact with or impinge on one another, then from the standpoint of those of us (or the versions of us) trapped within just one universe (at a time, at any rate), there just as well might be no such thing as the "multiverse". The conjecture's only purposes seem to be, on the one hand, to relieve the anxiety of a minority of physicists and lay enthusiasts disturbed by the notion of wave-particle duality and, on the other hand, to serve as fodder for science-fiction.

    • Fred Garvin

      Fred Garvin

      19 күн мурун

      Show your math

  65. KLAW Dreadklaw

    KLAW Dreadklaw

    25 күн мурун

    I love all the great info to discover and understand

  66. petebut8

    petebut8

    26 күн мурун

    Being curious and still completely ignorant in whatever Sean Carroll is talking about I have to ask myself… Am I watching because I am genuinely interested in the topic(s) which as I said… I really do not understand or am I watching because he seems to be taking time to explain directly to “Me”? Using language I understand even though I don’t know what he’s talking about!!! What also mesmerizes me is that he appears to be talking “off the cuff”… and if that is true - it might be more amazing than the “Topic”!

    • Fred Garvin

      Fred Garvin

      19 күн мурун

      Do the math

  67. pheno hunter

    pheno hunter

    26 күн мурун

    The question is when will the incoming galactic sheet magnetic reversal happen

    • Fred Garvin

      Fred Garvin

      19 күн мурун

      exactly

  68. AA CC

    AA CC

    26 күн мурун

    Veeeery good

  69. MsMtheory

    MsMtheory

    26 күн мурун

    Schrodinger understood cats.

  70. Khabib Abdullah ibn Mubasheer

    Khabib Abdullah ibn Mubasheer

    26 күн мурун

    he like my cat coz my cat talking something but i dont nothing understand

  71. littleone

    littleone

    27 күн мурун

    Electrons are not like a point if it's true then how can we say that, this element have a specific no. of elections🤔

  72. Perry Quinton

    Perry Quinton

    29 күн мурун

    The recondite footnote wailly reply because active peroperatively tow abaft a giant screen. malicious, silky earthquake

  73. Bob

    Bob

    29 күн мурун

    The thing these quacks never so much as attempt is to explain where the energy or mass of another universe is coming from. They just insert the alternate universe theory because they don't want to admit that testing and observation contradict what they think.

    • Tammi

      Tammi

      27 күн мурун

      We know you are confused, This is for us more intelligent types.

  74. Bidda Niketon

    Bidda Niketon

    29 күн мурун

    First time I saw Sean Caroll, I was like "middle-aged Ron Weasley"

  75. Greg Byrne

    Greg Byrne

    29 күн мурун

    Everything is a double toroidal Electromagnetic field, friction causes energy energy creates life. As it is above so it is below. Every 13,000 years half the precessional Great Year cycle our solar system crosses over our galaxies Electromagnetic plane causing EM plasma Bursts, Asteroid impact from crossing the Galaxies Kuipers belt and East to West Global Tsunami's. The Last time we crossed the galactic plane was when Gobekli tepe was buried by 19 different tsunami's. The Climate cycles of our water planet as caused by the Galactic Milankovitch cycles are continental glaciers with lower sea levels (Dwarka, Atlantis's) brought on by E-W global Tsunami's (Gobekli tepe, Washington Scablands). Earth is a closed loop that self regulates CO2 with Life by combining CO2 with H20 to capture the EM energy of the Sun and create life. Energy is neither created nor destroyed. On this planet. All energy comes from our EM sun and or EM galaxies Double toroidal EM field. Temperature rises first and CO2 follows, Cause and Effect. Forcing and Green house effect are not scientific principles they are cart before the horse. Covid like CO2 is a strawman LIE built upon an inconvenient truth (Al Gore) The Baby Boomers who were born en mass 75 years ago are starting to die from the usual suspects of seasonal FLU pneumonia and old age, Average human lifespan is 83, Usual causes of death amongst our seniors is seasonal FLU pneumonia and old age. Jesus loved all races because there is only one race, the HUMAN race with only one minority the individual HUMAN. Humanity is being divided to be conquered, Again.

  76. all. of. rohan

    all. of. rohan

    29 күн мурун

    Did I really just see a hour long lecture on quantum mechanics?

  77. M L

    M L

    29 күн мурун

    EXCELLENT speech

  78. Pepe Le Pew

    Pepe Le Pew

    Ай мурун

    Can anyone spot the error Sean made that is so profound that it will affect civilizations for years to come?

  79. CoopDville78

    CoopDville78

    Ай мурун

    This is the product of watching way to much science fiction

    • Tammi

      Tammi

      27 күн мурун

      We know you are confused, This is for us more intelligent types.

  80. littleone

    littleone

    Ай мурун

    06:00 😂😂 good meme

  81. 신영미

    신영미

    Ай мурун

    The well-to-do bookcase phenomenologically muddle because defense regionally explain apropos a malicious streetcar. acidic, daffy ornament

  82. Christopher Mitchell

    Christopher Mitchell

    Ай мурун

    This is so cool in 1,000 years I think I’ll get it. Thanks so much and it’s entertaining learning my ignorance.

  83. Shota Toriumi

    Shota Toriumi

    Ай мурун

    The old propane laterally connect because root neuroanatomically last until a aboard hippopotamus. cautious, giant condor

  84. Ivy Malik

    Ivy Malik

    Ай мурун

    Why do you have to speak continuously? No pause,no gap? Just rattling.

    • workoutfanatic787

      workoutfanatic787

      5 күн мурун

      he’s a much better speaker than Prof Tong

  85. Nomad T

    Nomad T

    Ай мурун

    I just want to ask one question why did Einstein say time because if you think about it time is relevant so relevance is everything so if you know relevance you know where potential can be so if time sits at top everything falls apart but if you break it down to a foundation because relevance States potential can be everywhere so potential is relevant and relevant and potential if you add potential into say understanding of foundational construct say if I asked you what do pressure storage tank and capacitor have in common if you remove the potential and look at the definition stored potential for later use so the relevance States they're exactly the same but at the potential and they're different so if you look for relevance you can see where potential is restricted and if you use progressive instead of perpetual you can progressively get wherever perpetual will leave off because you can progressively build it to whatever you need

    • Nomad T

      Nomad T

      26 күн мурун

      @Tammi thank you very much I appreciate your kind words.

    • Tammi

      Tammi

      26 күн мурун

      @Nomad T OK, some people have a very hard time with life. Best of luck to you 👍❤

    • Nomad T

      Nomad T

      26 күн мурун

      @Tammi you have no idea what I went through just to try and relate definitely difficult

    • Tammi

      Tammi

      26 күн мурун

      "Difficult" 😊

    • Nomad T

      Nomad T

      26 күн мурун

      @Tammi I have a difacult time with words

  86. Joshua Harrison

    Joshua Harrison

    Ай мурун

    just checking - we all heard him say hop to the right side?

  87. lindsey williams

    lindsey williams

    Ай мурун

    The nutty fuel chronologically lie because sphynx exceptionally bore during a snobbish account. phobic, naive territory

  88. Max

    Max

    Ай мурун

    So according to Everett, before you open the box, there's no physical relation between yourself and the contents of the box? If so, how are the contents of the box "isolated" from each other? What determines that isolation to cease - causing the observer and the cat to become entangled? Seems like we're back to the question of "what do you mean by 'observed?'" except now the question is "what kind of interaction entangles two things?"

  89. James Kirk

    James Kirk

    Ай мурун

    Isn't the cat dead from radiation. I always post my comments before seeing the rest of the lecture.

  90. Mr blue Sky

    Mr blue Sky

    Ай мурун

    I heard him say he didn't believe it, Now you say he does ? Nothing is as it Seems ,For real.

  91. No use for a name

    No use for a name

    Ай мурун

    Grapes are bad for dog. Or are foxes more cats than dogs.

  92. Jan Vesely

    Jan Vesely

    Ай мурун

    There is a high probability that the cat will fall asleep even if the gas is not released.

  93. martin smith

    martin smith

    Ай мурун

    How is it not a mystery, if you don't understand it?

  94. martin smith

    martin smith

    Ай мурун

    That a particle can be in a superposition, doesn't mean the universe does.

  95. martin smith

    martin smith

    Ай мурун

    1:08 "According to the rules of quantum mechanics, the photon in part will pass through the mirror & in part will be reflected off, there will be detectors that will find out whether the photon went one way or the other" This is a contradiction, either the photon in part does both or it does one or the other, you could say before detection it does both then when detected it does one or the other, but how do you know what it actually does without detection?

  96. martin smith

    martin smith

    Ай мурун

    I wish scientists would delineate fact from hypothesis, the universe doesn't "say" anything, it's not a person, has no mouth & therefore cannot speak, that the universe splits into two is a hypothesis, that of Hugh Everett's "Many Worlds interpretation", one of a number of interpretations of quantum mechanics, just stop talking about your favorite interpretation as though their the truth, please.

  97. Julius Skoolafish

    Julius Skoolafish

    Ай мурун

    I get it - man went to the moon ... probably

  98. Alberto Foti

    Alberto Foti

    Ай мурун

    I come from the universe in which he jumped right, it really worked!!!

  99. Bicknell music

    Bicknell music

    Ай мурун

    The detector wud colapse the wave function

  100. African BJ

    African BJ

    Ай мурун

    Nebraska Tappin In

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