Are There Many Worlds? With Sean Carroll 

What do you think your life is like on other worlds? You can learn more about the many worlds theory in Sean Carroll's new book 'Something Deeply Hidden': amzn.to/37sFhgo

I had a dream last night that I was the host of Event Horizon. For a moment there, it all seemed so real. Ah well, I guess it was just a glitch in the multiverse.

Mowed lawn, poured beer and now sitting outside while nerding out. What could be better!

I like to pour myself a fine single malt scotch, and puff a nice cigar, while a listen to this stuff and pretend to know what TF they are talking about.

Sean Carroll is one of my favorite theoretical physicist I could listen to him all day, thanks for having him on as a guest. Great episode John I thoroughly enjoyed it.

Perfect timing, I'm going to grab the popcorn👌

Just want to thank you for all your high-quality work and the long documentaries

Haha perfect ending

It's comforting to know that somewhere in the many worlds there is a me who is happy.

Oohhh that Outro! Great work putting many worlds into dramatic action :)

Sean is such a delight to listen to. Great show as always!

This was the best discussion I’ve heard on the subject. Perfect follow up questions enabled Sean Carroll to make it surprisingly understandable 😊👍🏼

Hi John.. great show as always.. Can you consider getting an expert on Abiogensis research to hear about the latest developments in the field?? and implications to FERMI paradox. will science ever be able to synthesize a single cell organism?

Since subscrib1ng to this channel my quantum physics is 1000% legitimate.

Within the infinite possibilities of superposition, there is a reality where 2 million people are Naruto storming Area 51 right now.

I'm a huge fan of Sean! His book "The Big Picture" truly is an awesome read. Hearing him discuss biophysics eventually led me to make it my major

You really set a high Benchmark with this episode.. my favorite so far.

By avoiding the Quantum Suicide issue, Sean is avoiding the big reveal! We're all playing it just by living our lives. As we get older, only versions that didn't die will still be around. When you're 300 years old, you'll pretty much know the truth of the multiverse just by reason that your life story is so weird by that point.

Sean Carroll? What a treat! Was listening to the other popular podcast at the moment with Nick Bostrom... my brain is going to appreciate that I'm switching to this one!

Hahaha, Anna just all like, "Wait, wut?" got me laughing stupidly hard.

Great job John - great to see Sean on the show! Excited to see what's coming in the future!

Loved this one. You're a perfect host, hopefully you'll get more of the popular physicist greats!!

Is double slit done in a vacuum chamber? Otherwise, all the electrons are observed by the air.

Holy crap, Sean Carroll. It's great to see how this channel is growing JMG. Good job!

I look forward to these, they make my Thursday nights feel complete! Awesome interview guys 👍

“There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another theory which states that this has already happened.” HGTTG

Enjoy the channel but getting a little heavy on the commercials there...

One of the best videos I have seen on the internet in years. Thank You for sharing this John.

Frasier Cain should've permanently hosted the show after this for full commitment to the joke.

If Dr. Carroll’s many worlds theory is correct, my question is why? What purpose would it serve to have the universe create a whole new copy of itself for each of the gazillion quantum events that happen every second on Earth, not to mention the entire cosmos? Then You would assume each of these new worlds does the same thing. The exponential growth rate of new worlds would approach infinity pretty quickly. Seems like an extremely inefficient and complicated way to design reality. Occam’s Razor would favor the simpler One World interpretation, which is complicated enough that we don’t fully understand it.

giggles..."Are There Many Worlds"? Of course there are many worlds. We have many worlds even located within our own solar system. One "non-literal" definition of a world ist still a planet correct? Not to mention the many dimensions of microbial as well seemingly infinite larger scale environments we designate as worlds, und the gazillion other physical & psychological constructs we reference as such. :-)

Hopefully there’s a world where I have enough time to watch this.

you're telling me there's a version of myself that's not living in poverty? well that's good to know... could the many worlds theory actually ever be proven? correct me if i'm wrong, but could you possibly gain evidence, when gathering evidence by itself only ever describes your world? i have that weird feeling, that we need to go deeper into the microcosmos to find more clues..who knows what kind of "spooky" things happen closer to the planck scale..

The particle wave function double slit experiment has been solved. The matter in which infuses itself thru quantum physics in this experiment is called a "partiwavicle" 😆👍🏻

I find multiverse with billion of "you" or "me" is totally absurd. thats only supertitions on LSD. the worst is they believe hard in this lol and the moon is still there if nobody is looking at it lol /shrug

The light is activated dark matter the dark matter is fuel it hasn't been used yet to make light which is frequency which is everything that's it Jack and Jill went up the hill that's it....

I didn't think there could be things that would blow Anna's mind. 😂

There is an universe where both Mars are Earth are populated by intelligent species. There maybe travelers between worlds already visiting us.

Reminder: Always watch to the very end of Johns videos! Great stuff!

That is why quantum computers are faster. You are using a humongous number of computers in parallel universes.

It puzzles me why anyone has trouble with the "many worlds" version of quantum mechanics. During every Planck Interval, every existent timeline branches according to the number of particles in the universe raised to the power of every possible interaction between any of those particles during that Planck Interval. That is an incomprehensibly large number of timelines, but it is nonetheless a finite number.

Many worlds gives us the adventures of Rick and Morty.

If there are an infinite amount of parallel universes out there, and there are infinite versions of you each taking alternate paths in life, that means that there is a version of you somewhere that murdered his(or her) entire family. Think about that.

Wow this is an absolute treat! The quality of the guests on this show just keep on impressing. Also, the description says: John Michael GodLIER... John is certainly a Godly RU-vidr!

What a treat! Sean is a delight and fostered an epiphany for me today.

oOoOOo spooky ending!

big guest!

Fantastic episode I really enjoyed the interview. This reminds me of one of my favorite Star Trek episodes Mirror Mirror. Just like my avatar you had evil spock with the goatee. Of course considering I myself have a beard I wonder if I'm evil me? 😈 Thanks for the episode!

Thanks for the excellent interview! More than my mind can boggle to be sure, but fantastically interesting!

I will generally listen to any lecture or interview by or with Sean Carroll, but it is really unscientific when scientists say they "believe" one theory over another when there is absolutely nothing tangible to back it up. "belief" is the stuff of faith, not science. I realize that, as in the rest of society, many feel a need to "choose a tribe" and defend it to the death, but that's not what science should be about, and it's not how science is going to move forward.

How do we know that we can't interact with the different worlds? Is it shown in equation?

Crazy how u can still hear wat he saying even if u fall asleep.

part three Alas, to this day, none of these bold branches of quantum gravity or string theory has succeeded in merging General Relativity with Quantum Theory. The number of papers that has been written on these ideas, especially string theory, is quite staggering… yet no one has yet succeeded in creating either fully self-consistent mathematical frameworks or meaningful experimental predictions. Ouch! So why so why has all of this not worked? The easiest answer is that the approach was imply wrong: Gravity is not an ant-swarm force after all, and simply cannot be modeled correctly that way. Somehow, in some fashion we still do not understand, it really is a spring-like topological force that is outside of, and in some fashion even more fundamental, than all of the ant-swarm forces that exist on top of spacetime. Did you notice how I just phrased that? I am trying to suggest a possibility of why gravity cannot be modeled as an ant-swarm force, and the hint is remarkably simple: Even if you finally figure out a clever way to define a gravity-like quantum force carried by gravitons, that allows objects in spacetime to attract each other, what are those force particles traveling across? Spacetime, just like all other quantum forces. So here’s the question: After you have defined your gravity-like, spin-2 graviton based, ant-swarm style quantum force on top of that spacetime… what happens if you go ahead and bend the underlying spacetime fabric anyway? The answer is oddy simple. General relativity tells us without equivocation and in exquisite detail that if you bend that space, you will have created a second gravity force, one that exists in addition to and on top of the quantum one. Or much more accurately: Underneath the quantum version, since like all of the other forces in the Standard Model this swarm-like quantum version of a gravity must ride on top of spacetime. The ant swarm simply must have a path, some kind of metric space, over which it can swarm, at least if it is defined in the same fashion as the other forces of the Standard Model. The bottom line is this: The most likely reason why all quantum models of gravity have failed, at least so far, is simply because they failed to notice the hidden redundancy buried within them: You cannot have a swarm-like quantum gravity force until you first define, either directly or implicitly, some kind of nicely smooth spacetime manifold over which that force can operate. The attempt to create quantum gravity was doomed to failure before it began, because it never truly attempted to understand what spacetime is. And there is your answer, as sadly incomplete as it is, for what will be needed to achieve genuine unification of General Relativity and Quantum Theory: We need a deeper, more profound theory of what space and time are. It’s not gravity that went wrong, or general relativity,but the red herring of attempting to create a gravity-like force that could never have been anything more than a pale imitation of true gravity. This new theory of “what is spacetime itself” will need to be more fundamental than quantum theory, as heretical as it sounds, since all quantum models at one level or another begin with spacetime as an assumption.

WOW! You actually got Dr. Carroll on the show! I'm so ready for this!! Love his podcasts and your show. This is really a spectacular crossover!! Thank you both!

Such a humble and smart interview by JMG, excellent work, love Sean, his book The Big Picture is one of the best out there on physics.

Once again my brain hurts.

Cosmological multiverses and quantum parallel Everettian worlds. Reality is a subjective mess.

Thank you for this video. Absolutely fascinating!

Hey Frazier Cain knowing how bad you are with acronyms (SFIA Science and futurism with Issac Arthur) JMG is for John Micheal Godier... Lol

Sean Carroll is my favorite physicist!!! How did it take me two days to see this video!? My metric for trusting physicist is by how often they say 'I don't know' and Sean does this more than most. Beyond that he doesn't get hung up on the great debate of whose interpretation of QM is most likely to bare fruit. Being a theoretician he can move head on with the most likely understanding, even though he's in the minority. I love this channel and all it's great conversations. Thank you for sharing!

Great show, as usual. Oh, someone misspelled your name in the description. Its kinda funny.

Loved the exit transition. That was awesome. Again, there is a way to prove if parallel universe exits. If new universes are created with 'every' decision (which i disagree with. They only diverge on massive events.) then as stated the electron is NOT created in each new universe. It has to pop out of our existence, pop into another to maintain that universe, then pop into another, and another, and another, then back to ours. Therefore, the amount of time an electron is missing should increase, and should be measurable. Unless Stephen King's The Langoliers is the correct idea, and as our Universe moves into the past........ (Worst movie ever). But Im just a nobody.

oh its thursday again... nice!

I'm not going to lie I kind of went a little fan girl when they found this. Lol 🤩

The wrap up at the end was awesome! 🤣

New book? I see Audible has it😀 I did enjoy his book, "The Big Picture."

I absolutely love John. He always has other smart people on his shows and has a pretty good since of humor too.

That plug transition was amazing. Well done John.

Excellent content as always JMG, keep up the good work 👍

Rogan Watching This On DMT

I prefer to think of us (our consciousness) as avatars in the Creator's Universe simulation, (for study? for play? for art? for experimentation? ...who knows?) [possibly one of many simulations] where the "many worlds theory" equates to the many saves possibly accrued on the Creator's holographic, [true] quantum gravity theory hard drive... his/her information storage. (Black holes, anybody?) To take it a step further, I myself (MY consciousness alone) may be the sole protagonist, the "viewpoint" chosen by the Creator to focus on for... who knows what? - where only MY consciousness matters in this simulation, and you all are just NPCs coded to flesh out MY observations, perceptions, and interactions. As an avatar enmeshed in the perceived reality of the sim, how could I ever know if all your consciousness really exists or not? The only thing I know is that MY consciousness exists... avatar or not. This is my opinion, and I'm sticking with it! Prove me wrong, I dare 'ya. :)

Always a great pleasure to hear Sean Carroll. He's just amazingly good at putting these difficult matters in clear words.

By the way... there's another Oumuamua-like object making the news this afternoon: www.thesun.co.uk/tech/9912329/interstellar-space-object-solar-system/

Oh. My. God. (For the lack of a better word). I have nothing else to say.

Don't make this channel angry. Nobody crosses the event horizon and lives.

Sean M. Carroll is one of THE most prominent people on Earth, more influential than any celebrity - well, he should be!!

dang i cant believe you got Sean Carroll your the 'fword' man Event Horizon guy

Is there a universe where carbs are good for you? Oops did I just make one? If I did how do I get there?

When universes collide, we see ghosts. They enter our universe for a fraction of second and go away. This is just my thought and could be wrong.

I swore I just read this comment

I swore I just read this comment

Another outstanding episode! Great work!

The parameters of our current universe are nurturing to us only to the point where we are ready to leave it. I believe we exist to emerge from our reality. Some might say the after life is just that, however, I believe at one point we will have become so developed and matured as specie that we will "tear" a gateway into another "universe" with its own parameters which will be home to our next stage of development as a specie. Think of it as ranks in a game or sport. The more you improve and develop the closer you get to the next stage of your evolution. The only difference being the framework in which our existence evolves in. It is our unrecognized goal to truly grow and emerge from our reality. Life is beyond just our universe :) Ps. Thank you for your truly thought provoking content. It not only tackles our current scientific understanding, but also encourages deeper more philosophical ways of thinking.

Finally a srsly good scientist interviewed on this channel.

But who is the Rickest Rick?

Big thanks for this interview and video Godier. Everyone needs to hit the notification Bell on you my friend

We are one version of many worlds competing with each other to save ourselves from total annihilation. With limitless possibilities theres bound to be a version that will make the escape.

Anna is onto something -_-

Well... I definitely agree about the Copenhagen interpretation... But I really don't know about the many worlds interpretation either. I still think it's something much simpler... We just can't "see" yet (technologically speaking). But who knows.

I admired Sean until he misrepresented a chart from SCIAM about biological sex to say there were multiple semesters. More than 2 that is. This IDEOLOGY harms children. This us sad and unfortunate. One wonders his motivation.

that ending was cute... ;] wait, what? even machine stucked... there is something silly in this. beautiful, just beautiful. LIKE WHOLE TALK. My ears was glued to your voices for the whole time.

I think when you are new to a subject ( quantum computing or whatever ) you get results that are unconventional then as you learn the rules of your universe ( or the most produced outcomes ) you get results that are more of the usual outcome

Sorry but you say Copenhagen interpretation is not providing details on when the observer might cause the collapse of the wave function (should the observer be conscious? Should be big? Etc). And I buy this critic. But don't you think many worlds is escaping similar questions as well? Like: under which conditions the branching happens? Any time a conscious observer observes? Anytime something can swipe left or right? Anytime a decision can be taken? When?? What makes me harder to believe many world is that if we keep it literally, any single electron can spin left or right. So, for each electron we have at least 2 worlds. So, for a single person 0.001 second of life, we might have 100000 worlds branches. Does that make sense?

Can we accurately say Jet Li's "The One" is a documentary?

Bought the book straight away.

7 skys 7 earths and distents between first sky to the next is 500 years speed of light. And we are 70 copies look alike. Could be in different skin colours and in the different countries. Many incident I've met people that felt I've seen them or know them before. I don't know what I'm talking about 👀 I'm talking in my sleep 😴

In fact, as is shown by the success of the path integral of Feynman, the quantum world is not just constantly splitting along various paths but also constantly merging various paths. One one side, it is a question of decoherence ; on the other side, it is a question of fuzzyness and resonance. This concept was anticipated long ago by Philip K. Dick in his novel «The Man in the High Castle», published in 1962.

Gravity and Quantum Theory are of such many magnitudes of difference in force apart from each other that we have no physical means to conduct an experiment to observe that unification short of leveraging the amount of energy that which would rival the initial singularity (big bang) of our universe itself.......which is absurd to assume we could create that let alone survive such an experiment ........however, within a Black hole we might be able to discover an observation demonstrating the symmetry of those forces........

part one: sorry for the length of this and i have to post it in three parts because of youtube comment character limits and my utter failure to be able to be concise due to my severe dyspraxia which affects thought organisation. general relativity is the more complete theory as it is able to express spacetime, which is more fundamental than the standard model or the quantum fields that give rise to it. Everything including the fields all oscillating and being locally excited into stable particles sits on a smooth manifold, a membrane like minkowski-einstein spacetime structure. Gravity is a topological force, it is a geodesic curve, it reveals the fundamental grand geometry behind what everything in the universe 'sits on top of'. gravity is-i curve space-time. you can't quantise that. but with the photoelectric effect einstein did quantise light. but he found space to be expressed as a non quantised geometry, because that's what the physics was saying. After 7 billion years of travel, high and low energy photons arrived at NASA's Fermi spacecraft a mere 900ms apart, which is like racing a speedboat one through water one through molasses and having them arrive at the same time. which just doesnt happen. so it concludes space is smooth and continuous-just as einstein maintained, not foamy enough to interfere with gamma waves speed compared to lower energy photons. Because Einstein predicted all electromagnetic waves travel at the ever constant speed of light. I agree with sean caroll on leaning towards everitt's relative state interpretation-the universal wavefunction, which inferred the later MWI. it is faithful completely to the schrodinger equation, so i favour it. however i dispute that quantum mechanics or the standard model is more complete than general relativity. the standard model has about four massive problems-doesnt provide or explain the fundamental constants that have to be manually imputed to provide precise values for particles, doesnt explain asymmetry between matter and antimatter, nor dark matter, nor dark energy, and doesnt account for gravity and the latter point we are talking about here. quantum physics cant seem to produce gravity. sean carroll's approach is rather than trying to quantise gravity, start with quantum theory and look for gravity in it. but that still doesnt bring us gravity despite a hundred years of trying. The Standard Model was really based entirely on Special Relativity, which is not just compatible with quantum theory but very quickly became an integral part of it. consider though they still require us to put in the fundamental constants manually that determine the specific values of particle properties,of all the forces apart from gravity. all the leptons, quarks and bosons and their interactions are derived from quantum field theory-for each of the forces and particles of the standard model, except gravity, dark energy. dark matter and the fundamental constants that have to be manually imputed to produce the specific values of all the three types of particles, nor does it explain the origin of the matter-antimatter asymmetry, or the reasons behind the values of our fundamental constants. it doesn't produce the fourth fundamental force-gravity, because gravity is not a force, and space-time and general relativity are purely geometrical. so we get from it six quarks and antiquarks with three colors each, 3 charged leptons and antileptons, 3 neutrinos and antineutrinos,8 massless gluons,3 weak bosons,1 massless photon, and 1 Higgs boson. these quantum fields of low energy may or may not be zero and even what we think of as empty space is essentially a vacuum of quantum foam which oscillates at different energy values,that permeate all of space Note that only general relativistic quantum mechanics managed to predict anti-matter-which paul dirac successfully combined. And this is determined by the specific mathematical structure - SU(3) × SU(2) × U(1) - that underlies the Standard Model. This is a gauge quantum field theory specifically. Each particle corresponds to the fundamental quantum fields of the Universe all excited in a particular way. But we know that in the quantum Universe, we have to replace particles with wavefunctions, which are a probabilistic set of parameters that replace classical quantities like "position" or "momentum."

This sounds a like failed physcist juggling epicycles to maintain a failed mathematical hypothesis which bears no resemblance to the real physical world. What next? More epicycles? Epicycles within epicycles? Consensus? WTF, since when is physical phenomena something to decided by voting?