Mindscape 63 | Solo: Finding Gravity Within Quantum Mechanics
Vložit
- čas přidán 26. 06. 2024
- Blog post with audio player, show notes, and transcript: www.preposterousuniverse.com/...
Patreon: / seanmcarroll
I suspect most loyal Mindscape listeners have been exposed to the fact that I’ve written a new book, Something Deeply Hidden: Quantum Worlds and the Emergence of Spacetime. As I release this episode on Monday 9 September 2019, the book will officially be released tomorrow, in print, e-book, and audio versions. To get in the mood, we’ve had several podcast episodes on quantum mechanics, but the “emergence of spacetime” aspect has been neglected. So today we have a solo podcast in which I explain a bit about the challenges of quantum gravity, how Many-Worlds provides the best framework for thinking about quantum gravity, and how entanglement could be the key to showing how a curved spacetime could emerge from a quantum wave function. All of this stuff is extremely speculative, but I’m excited about the central theme that we shouldn’t be trying to “quantize gravity,” but instead looking for gravity within quantum mechanics. The ideas here go pretty far, but hopefully they should be accessible to everyone.
The end of this episode includes a bonus, a short snippet from the audio book, read by yours truly. Audio excerpted courtesy Penguin Random House Audio. - Věda a technologie
First episode I've heard, just came over from your interview with Joe Rogan that came out today. When I heard you tell Joe about spacetime/gravity emerging from quantum mechanics, my heart jumped! I went to a physics colloquium at UCSB (either 2017 or 2018 in Webb Hall across from Broida) where you were giving a talk on spacetime and gravity potentially being emergent properties of a finite dimensional Hilbert Space. Had a great time at that talk; I'll have to look for my notes on it to re-live it somewhat! Wish I had your (to be written) entanglement-centric textbook over Griffitfths when I took QM!
Just want to say thank you for being such a wonderful communicator of science, and champion of understanding the reality of quantum mechanics, rather than simply the most complex systems we can successfully predict or conceive. Keep it up!
I'm glad the universe split for this version of me in such a way I found Sean Carroll and these podcasts.
Of course it did!
Agreed! But it looks like we've taken a wrong turn somewhere, this 2020 seems a few standard deviations from the mean.
A lot of content in this podcast. I've listened to it a few times and will do again a few more 🙃
very good humor but ya i guess
You’re probably listening to Sean in most of those worlds
Just want to say thanks for doing these podcasts. I have recently found your channel and I am greatly enjoying them. You are an excellent host!
You should check out his series on dark matter with great courses plus. Phenomenal teacher, this dude. (aka the teaching company - TTC)
Turned it off after the first 2 ads in 8 mins.
I've read and listened to a great deal concerning quantum mechanics and gravity, and I feel sure that this podcast contains more, way more, interconnected ideas than anything I have encountered before. I'll be chewing on this for some time, I think, which of course is a compliment.
I've done graduate research in the area and am familiar with Ted Jacobsen's work (and Verlinde and Padmanabhan and others) and just wanted to echo this sentiment. I think having the verbal descriptions Sean provides as conceptual scaffolding REALLY helps put those ideas into a tapestry where those connections are made. He has long been my personal favorite public speaker.
I recently did some exercises programming a quantum computer. I was surprised how much this could teach me about quantum theory in general.
For quantum computing you don't even need to understand physics, if you accept some unitary state transition matrices. And then it's entanglement over and over again that lets you achieve some computational task.
I recommend this experience to all physics students.
Just would like to mention honestly and without flattery, that Sean Carroll knows how to elaborate things very well and with simple voice tonality, which reflexes non-arrogance tick that makes it for the audience a pleasant thing to listen. Thanks a lot for all the effort sharing knowledge in such a way.
Sean, this may be your finest hour.
This is by far my favorite episode so far!! Thank you Sean.
I want a Mindscape T-shirt that says "As quantum as you can get"
Me, too!
Oh boy!
@@skatekraft I want one too that says - Mindscape Localize your gravity in spacetime
I want swim pants that says "it's *this* cold", and then if you zoom really (really) in, there's a penis drawing on the scale of the planck lenght. I need to first be able to draw objects that small, of course, but that's what the kickstarter is for.
But, it will say that only when someone is reading it.
One of my favorites eps, thanks much!
I like this podcast a lot : Either I try to follow your university lectures with most of the stuff outside my math capabilities, or your open lectures which are generalized to to a point where they leave too many questions. In this video however, you explain everything and remember the details and footnotes to build up to your arguments, which makes this much easier to follow. Especially your insights of how to visualise the Quantum world an large scale is an eye opener.
These podcasts are awesome ….specially the ones on physics. Looking forward to listening to more. THANKS!
Hi Sean, I had the pleasure of meeting you this morning at the Milwaukee airport, right before our mutual (cancelled) flight. Hope you made it back home without too much trouble! Thanks for doing this new podcast. I'm subscribed. Looking forward to more of them. Take care.
Excellent explanation of QM and the way you link concepts like entanglement, emergence, decoherence, locality and many others. Hope you soon edit and publish the QM book for undergraduates you announce. Tomorrow "Something Deeply Hidden" arrives and I am lovely expecting it. I like the way you refer to the cat as awaken or slept, for those who love cats it is very gentle and respectful to these cute creatures.
Look SS, about your cat, I'm afraid I have good news and bad news.
4 lmao...that's really funny...probably overlooked
Really enjoying these solo episodes, Carroll is a legend.
I really like the intellectual honesty in his approach to quantum mechanics and the clarity of his descriptions.
In my 7 years of doing physics I’ve never heard anyone describe fields in this way. Thanks for teaching me that! I really enjoy your podcast and all of your books!
Basically a free lecture on the latest research! Thanks!!
YES!!! I have been looking forward to this talk on gravity and the new book coming out.
Extremely clear and helpful summary - thank you! I have been tasting the individual ingredients listed in a recipe (my past education in QM and physics) for a delicious horizon shaped pizza and this podcast has allowed my mind to taste the finished pie.
…bean tasting ;)
i like you sean, and think your cool AF. i build houses with my hands, but i dream of space all day long. you bring it to a point where i can fathom some seriously complicated shit. thanks from the world for your gift!
Did i just find a Sean Carroll's channel?! Thank you, CZcams!
Blows my mind every time. Great episode!
It's refreshing when someone with such a deep, advanced knowledge of cosmology can break very deep topics down into bite sized, manageable pieces for an average person
This was as deep as a black hole. Intense! So amazing.
this is one of the few best thing that happened to the internet. I'm a huge fan of you sean ✌
Thank you very much for doing these podcasts
Thanks Dr Carroll. I always enjoy your podcast. Very enlightning.
Khairul from Malaysia
You are an EXCELLENT professor Sean. Thank you Very Much for your devotion.
another big fan here filled with awe for your easy style, mr carroll.
i do enjoy that you do not say a word ABOUT consciousness anymore. but you put my mind in a very agreable state with everything else. thank you.
Reason why I get all your audio books, stuff like this as well. Thank u
Your podcasts are wonderful, Sean and you are the most articulate science educator I've had the pleasure to listen to.
Love the show Sean!
An amazing episode from a fantastic podcast. Been looking forward to this new book. Grateful for Sean Carroll -- gifted communicator par excellence with a nice humble style
So excited for the book!!
That Jacobson insight/speculation is sweet.
Thank you Sean for a great capstone summary. I'm a long-time fan of your work. You have a gift for clarity of thought and expression! Would love to hear you have Tim Maudlin on the podcast someday.
Thank you for taking the time to share your knowledge to a degree of experience that is not “spelled out” through “simple education”, however, you, explained, through experience from education from your individual experiences. I really appreciate your description based on “multiple opinions” to express “your own.” I agree with your message within my heart. Thank you for your time to share your knowledge.
Wow I find this so fascinating, I believe when you were on the Event horizon podcast you mentioned the universe itself being in superposition. That just blew my mind!
Hi Sean, Quantum all the way !! keep it Up
I wasn’t aware that Sean had a podcast. I love it
Well, that's a challenging 110 minutes! I think I was somewhat in touch for the first thirty minutes but the last hour was a struggle to even crudely comprehend aside from a few flashes. Not that I am complaining, I love these podcasts and it's great to be challenged and have (far) more depth than I can manage.
Brilliantly done, thanks so much for the series. More Susskind, and more QM, please!
Yeah, my head hurts slightly after listening to that -- and I'm not kidding.
Well, I know what I will use my audible credit for!
Great talk Sean. Thank you..
When you get the blanket thing you can relax... because everything you could ever want or be, you already have and are.
Thanks Sean. I don't understand a word your saying but you state it with CONFIDENCE!
Thanks, Sean. It was really great to combine mentally together the Schrodinger's cat with a black hole. nice job!
It looks, that the cat is living within ER bridge, watching the Universe from there, while having EPR ties on the opposite side of the bridge.;)
"Theoretical physics is all about trying it out". Professor Sean Carroll 2019.
Love these podcasts!
Amazing!!! thank you so much. I am just a normal person following science and this is one of the gold nuggets i found in a long time.
Also mindblowing was Burkhard Heims theory. I think he goes along with this view on quantum mechanics.
Sean Carr-OLL?...I just love that 'question intonation' thing he does in his speech at the end of each phra-SE and sente-NCE? ,he utters?: He just sounds so open, friendly, open-minded and questioning: He's such an incredible, logical, reasoning, intuitive genius.
Best one yet !
U rule dude. - Nano Pharr, Texas 2019
I’m a fan, Dr. Carroll
I’m writing from the Netherlands and I hope you would address this explanation I have of a superposition:
When we toss a coin in the air, the coin is in a superposition until it hits the floor.
While it is in the air tossing, it is both H and T. With a probability it is H and with another probability it is T.
And we are in the Classic world and not in a quantum world.
Hitting the floor is equivalent to “being observed”. And all our experiences in life is like that.
I do hope you will somehow read this comment /question, on this January 9, 2021 day that I’m writing this in Alkmaar, a pretty Dutch town in the Netherlands!
Your explanations are way better than any documentary I've seen on TV(like Discovery or National Geographic)
Thank You!
Just when I think I am out, many worlds pulls me back in...
but also doesn’t at the same time in another universe
Giving interaction in comments to make analytics better because you deserve more exposure.
answering to you for the same reasons :) I can't imagine how this has 2k views...
Where Dr. Carroll makes me a believer in many-worlds.
Incredible stuff
Best episode!
I salute Your intention of writing a new textbook on QM for undergraduate, as I really agree to Your view that the traditional presentation of QM is a monstrous disservice to students approaching QM in 2020, for the very reason that You expose.
i bought the book and read it and then listened to it, now his lectures sink in more to me :)
As I hear this changes my life
Wow is it weird i have this in my head word for word very easily. Trip out. On quantum mechanics.
Yes. your wonderful Sean.
Is there a way to give multiple likes to a video? This is the best episode yet where Sean connects every quantum and cosmological theory you've ever heard onto a map with Many Worlds at the center.
Yes, shift throughout the multiverse wave function and like the video in the alternate realities as many times as you like!
Now, this should be interesting. Sean always has a good show. I wonder, however, how could there be "Gravy" in Quantum Mechanics. Let me get my glasses here...
If this is in Barnes and noble tomorrow, I’m gonna grab it
Listening to this i feel I'm way over my head. Thankfully i can borrow yours. Thank You! :D
Thanks Sean Carroll for all you do to try to explain science and esspecially QM.
"Inflation" would be a very natural expectation in a decoherence based gravity, or emergent geometrodynamical extension based on interaction-locality.
Indeed, probably the emergence of extension would be more effective when decoherence is more effective, i.e. when more systems have a chance to interact with each other, i.e. when they are all close... i.e. when it's big bang time. :P
1:55 - Groovy! ^.^
The reason the 23:12 narrative of Schrödinger's cat t.ly/rFDi is popular and memorable is that it is macabre. Macabre concepts stand out in the memory because we have evolved to pay special attention to them. (The Major Memory System takes advantage of this.) That's why the cat doesn't only sleep.
Genius teacher
34:00 - 34:11 That is an assumption. Throughout this discussion, you've sneakily included the (contentious) premise that Psi/the Schrodinger equation/ the wavefunction is ontological.
I don't think he has done that sneakily, he's pretty explicit about being an Everettian where the wave function is the truest fact about reality.
He sneakily says that is his viewpoint in the beginning.
I wonder who are the people who 'dislike' this kind of stuff.
Sean may be right or wrong, but there is nothing wrong with having a coherent point of view,
I think that one of the first things that might be good to clarify to the general public is splits occur on quantum states e.g. spin of an electron (up / down), and probably not arbitrary life / historical choices for macro systems. I think chaos and attractors could play more important roles on how these branches evolve.
That description of locality emerging from entanglement is mindblowing, does that in principle reconcile epr with locality? The second particle is "local", after all?
This channel is fantastic, right in the middle between basic videos and what you get when studing the full physics...
1:25:07 YES!!! Damnit!
Sean, Brian and Neil are leading the game
IMHO Sean goes much deeper with more clarity that the other two.
Chip Hill lol Brian’s green elegant universe is deep
Is there only one wave function or one for each type of particle field?
Thank you Sean!!! One comment though, you end a lot of statements with “OK??”. But often those statements are of such magnitude as “space is the property with respect to which interactions are local. OK?” If you are asking, which the intonation would suggest you are, the answer is No! They don’t just absorb like that. Again thanks for this one, I’m going to have to listen to it many more times, but for future reference when you ask “OK??”, just know the answer is “NO!!! Not yet” lol
Any plans to release your podcasts with video ?
Thanks!
Hi Sean, can you say that when we observe a part of our universe we are forcing that part of the universe wave function to collapse and hence we are somehow changing the progress of its flow?
Very interesting.
Are the "worlds" in the many-worlds interpretation mathematically just a kind of vector subspaces onto which the vectors (the wave functions) can be projected to? And then we need to figure out how transformations of the wave functions translate to gravity acting in those vector subspaces?
Mr. Morris and myself applaud your respect for the life of cats.
Edit my cat is Morris the cat 🐈 😻 and over the years you have made so much information available to people who can't afford college like myself and while care giving for my mama I can mindscape for a little when I need a little escape 👏
I have no idea if I only just noticed or if Sean got that "Ok...?" from David Albert :D
On a side note - if you are reading this Sean, you need another appearance on World Science Festival or even better at The Royal Institution. You are very good talker!
There's a lot to unpack here. Few years worth of unpacking.
Like a lullaby
I also found that charge comes from the particle while gravity comes from the wave part of it . Another words the momentum of the electron = it's gravitational attraction x it's freguency
Thank you for these and all the other podcasts, specially about quantum mechanics. I look forward to read your new book, and I hope that it will be translate in Portuguese (quantum mechanics is already hard enough...).
Doesn't AI translate reliably these days?
Dear Sean, thank you so much for your excellent programs. I am not a physicist, but just a question. If gravity is quantized and force is transferred via graviton boson, how can gravitons escape a black hole to reach another mass to transfer the force? if photon cant, I suppose so cant the graviton even though be virtual.
Is it possible, practically, to use the math of the wave function to predict the classical movement of something like the moon? Or is it too difficult, and in practice we have to use classical physics?
I wish I understood what sense to attach to the concept of "part" as in when, in the description of Schrodinger's cat, it is asserted that a "part of the wavefunction says the atom has emitted a particle and part of it says the atom has not emitted such a particle". What is meant by "part" here? Are we to take it a spatial reference, as in this "part" of the room? Or are we to understand "part" in some other sense?
I don't understand how an entire universe can branch off still containing all the energy. And branch off again till nearly eternity while presumably keeping all the stuff in it? I just can't come even close to imagining the reality of such a thing. It's hyper un-intuitively.
I'm trying to understand entanglement.
Is it true that particles will only stay entangled as long as other forces aren't applied to either particle?
If my understanding is accurate then particles would only stay fully entangled for a very very short time.
Am I at all on the right track?
I have a question about wave particle duality and the wavefunction. My question is what if an electron is just a particle and time is actually a wave. What if the interference pattern from the double slit experiment is because the electron is riding on a time wave, similar to pilot wave theory. How does this affect The Schrödinger equation and our fundamental understanding of quantum mechanics?
Is there any validity in thinking of the future as the wave function of the universe in superposition?
Maybe someone can answer a question I have. If you were to ascertain a quantum objects exact location (ignoring velocity) and then look away. You then look again 1 planck second later would the new location bare any relation to the first position or would it again be random? Because I have difficulty excepting nature can do anything truly random.