The Many Worlds of Quantum Mechanics | Dr. Sean Carroll

Join renowned physicist Dr. Sean Carroll as he unravels one of science's greatest mysteries: the true nature of quantum mechanics and its mind-bending implications for reality itself.
👨‍🔬 About the Speaker:
-Homewood Professor of Natural Philosophy at Johns Hopkins University
Fractal Faculty at Santa Fe Institute
-Author of "The Biggest Ideas in the Universe, Vol. 2: Quanta and Fields"
-Host of the Mindscape podcast
-Recipient of prestigious awards from NSF, NASA, Royal Society of London & more
🎯 In this fascinating talk, Dr. Carroll explores:
Why quantum mechanics remains puzzling despite its practical success
The probabilistic nature of quantum measurements
The revolutionary "many worlds" interpretation
How our reality might be constantly branching into different versions
Implications for quantum gravity and spacetime emergence
🤔 Perfect for:
Physics enthusiasts
Science students
Anyone curious about the fundamental nature of reality
💡 Whether you're a seasoned physicist or simply curious about the universe's deepest mysteries, this talk offers profound insights into the quantum nature of reality.
#QuantumMechanics #Physics #Science #ManyWorlds #SeanCarroll #QuantumPhysics #TheoreticalPhysics
🔔 Subscribe for more mind-expanding content at the frontiers of physics!

[@jackbailey7037]

I'm glad I'm in the same universe as your video..

[@amitavadatta9203]

Prof Sean Carroll is a superb presenter, as always!

[@Sci-Fi-MIT]

We agree!

[@09Maggio]

I love how he presented, he would make this subject clear to a 5 year old

[@scottgreen3807]

Great stuff. Everything said is right. Thanks. I agree with all yer ideas and I got more. Hint, I dissassembled time and found what drives it. Our problems are having only to do with our perception of time and it’s really really simple. Someday I’ll explain. It’s so simple you all will want to kill me. Until he asked a question.

[@WilliamHaich]

I feel like a single particle can be in superposition by itself, but as soon as you bring in another particle(observer) it no longer is in superposition.

[@scottgreen3807]

Gr3at stuff thanks…I made myself a schematic of time. We are almost there. For one, force is one dimensional, your wave function is two. The propagation of said quantum field disturbance is a three dimensional bubble of expansion. Get that. And with in an atom this wave/ bubble is confined in a wave / bubble guide in essence. Say quantum. Think of that. No really, our idea of time is not mapped out properly, then it becomes quite clear. Someday……..

[@quill444]

_People tend to amorphize the concept of Many Worlds of Quantum Mechanics, as in imagining a different version of "me" or "you" or of a living/awake cat as opposed to a dead/sleeping cat; but in fact, if Everett is correct, then the billions upon billions of electrons and protons that comprise the cat (or you, or me) are all constantly "splitting" into Many Worlds, such that upon "opening the box" we should find not only a living/awake and/or dead/sleeping cat, but perhaps a million versions of the cat that have rabies, and maybe a thousand that have begun to consume their owners, as well as trillions of iterations of "cat" that are asleep but alive and purring, etc._ _Thus, to personalize the whole process into a whole, living animal, or into two specific human forms such as me either: watching television, or me not watching television, while perhaps being legitimate outcomes, tends to both trivialize and obfuscate the actual (molecular?) nature of what quantum reality is actually being manifest. Of the trillions of molecular changes that represent the living/awake cat, a small portion must include a cat that will die/fall asleep in the next hour, or minute, or even instant._ _Therefore, to study this phenomenon in the form of a massive, warm-bodied mammal such as a cat may lead us more astray, for the actual "split" into each possible different world happens at a structural or molecular level, and the entity known as "cat" (or you, or me), while made up of these smaller constituents, are hardly good models of representation of Quantum Mechanics. What makes a cat, or you, or me either "alive" or not is not a coin-flip, but more likely a trillion, trillion coin-flips._ 🎲 - j q t -

[@lepidoptera9337]

Everett simply didn't understand quantum mechanics. You can find his major mistake in the second sentence of his thesis.

[@toucan1262]

So; does the recent claims by Google that their new Willow quantum computer chip has accessed parallel universes have any bearing on the wave function collapse problem? Curious to hear people's thoughts on this.

[@lepidoptera9337]

Not sure what they were smoking over at Google, but the answer is "Hell No!". :-)

[@toucan1262]

@@lepidoptera9337 Thx for the detailed thought. That helps heaps :)

[@oxident-954]

It implies there's no collapse at all

[@lepidoptera9337]

@ There is, but only in the minds of the binge drinkers.

[@lightlegion_]

You’re doing something incredible!

[@Sci-Fi-MIT]

We appreciate it! We're trying to make complex topics accessible.

[@phongphatwetchasit6879]

Your cat can stand up and sleep in the same time or time is bent at your home😮

[@Doofinvesting]

The more I try to understand quantum mechanics the less I understand it

[@subjectiveguy3796]

I think ultimately what we are doing is dabating over, whether wavefunctions are objective or rather subjective truly with these various interpretations. It's a very compelling theory the MWI is,eventhough i find it very hard to comprehend only since the wavefunction is considered as an Objective reality, and true reality... My doubt regarding this is ,since we don't definitely know or in other words since it's impossible to know what Objective reality truely is subjectively as observers without even observing it,then how can we consider something that represent Objectivity as a construct as Objective itself, moreover there are more fundamental quantum fields also exist in MWI then how something that representQF considered Objective? Moreover wavefunction needs an observer to exist to describe an emergent state , if not QFT is more fundamental there ,So how is wavefunction Objective rather than subjective? If we consider emergent reality as Objective then there are possibilities of more relevant Objectivity exists with higher level observers( if exists) than ours... For me superposition seems to represent a neither state since we don't know about it,but don't know if it is right or not

[@lepidoptera9337]

The wave function is not objective reality and we don't teach that it is. That's just one of those nonsensical ideas that permeate the internet.

[@dottedrhino]

"The wave function instantly collapses for the other particle." - There *is no* "instantly"! We are speaking space like separation here! (and even if we weren't!) I think superposition becomes increasingly unlikely for bigger objects. This means the macro-level universe can be singular, but I don't have a theory for that. In Dutch we would say: "Het rammelt van alle kanten." I understand that it is very elegant to suppose the wavefunction always obeys the SE. But it comes with some cost! And I think it is not well motivated. The MWI requires that the entire universe gets xeroxed, and that I find absurd. The alternative is that the universe doesn't get xeroxed, and that is far more palatable, and more likely to my taste. It is compatible with Copenhagen and could be compatible with MWI. It is a very subtle issue. BTW, assuming you are in branch spin-up and then guessing what the probability was you got there? You can do better than that!

[@lepidoptera9337]

Superposition doesn't exist in nature at all. It's just a mathematical property of the theory. It's not a property of physical systems.

[@dottedrhino]

@@lepidoptera9337 In some cases, yes. But in some other setups, superposition seems real.

[@lepidoptera9337]

@@dottedrhino I have measured trillions of quanta myself. Not once did I see one in superposition. Seriously. The theory is NOT the same as reality. In reality a quantum of energy is either in your detector or it's not. It's a binary outcome. Only the relative frequencies of these binary outcomes can be expressed in a linear theory (because of statistical independence) and the counts can be added and subtracted from each other... but those counts are on paper. Nature does not care about them.

[@jamesfarmer-jn4gy]

The path of least resistance is red/blue

[@jimhunter6795]

Triumphantly claiming that your theory maintains conservation of energy when it concedes constantly branching parallel universes is a bit much lol. If we can accept constantly branching parallel universes why can’t we concede that energy isn’t perfectly conserved? Whatever the solution is it’ll be strange, so my point isn’t to mock the many worlds theory. It’s just to point out that many worlds theory is itself extremely weird and nonintuitive, just like claiming that energy isn’t perfectly conserved.

[@jamesfarmer-jn4gy]

Bro the act of observation is a Higgs coupling

[@SampleroftheMultiverse]

Is there a connections between civil engineered trusses and atomic structures? This video shows a natural quantized effect using a version Euler’s Contain Column Theory? This video of an engineering test models the quantum physics problem called “Particle in a Box”. The wave function is used to predict the location of quantum particles, atomic structure and molecules. kzbin.info/www/bejne/raOlpKSfepWpfZYsi=J5jCMxq3pRe_P-gG Very stable trusses and truss core panels have been fabricated using the process shown in the video. The video shows how materials naturally respond to induced stresses in a “quantized“ manor. The process’s load/deflection’s sawtooth curve with its exponential fit in the engineering study shows the previously unknown bifurcation between quantum jumps. The effect has been used to make light weight structures and shock mitigating/recoiled reduction systems and earthquakes isolation systems. The model shows why with the, exponential load increase and loss of resistance at phase change, quantum jumps are so very fast.

[@jamesfarmer-jn4gy]

Someone tried rewriting a press conference with hawking as the thermodynamic process of hybridized orbitals instead of the virtual particle pair he implied

[@garybala000]

Hey, you know the cynical view of this lecture is this. QM and the S. Equation and the wave function and the Everettian view is all well and good, and beautifully explained. Except the part where there is no explanation of how or where our everyday classic Reality exists! In other words, a Many Worlds theoretical construct of a quantum “non-reality” is explained, but our true common Reality is unexplained and left untouched. Hmmm. Kinda like exploring how many angels can dance on a head of a pin. Irrelevant, Sherlock.

[@SpoonsOfApe]

Taking the equations that perfectly describe quantum mechanics at face value is irrelevant cause you cannot see it? Why should experience influence our understanding of quantum mechanics?

[@lepidoptera9337]

The classical world emerges from quantum systems through repeated weak observation. The first example of that was given by Mott in 1929. It's rather trivial because it follows from nothing deeper than the formula for conditional probabilities.

[@ovidiulupu5575]

If quantum waves are real, wich i belive, then must be a suport medium for them, electro magnetic waves also, local superposition of diferent states or waves like radio posts.Longitudinal em waves May be an answer for quantum waves also, if they exist. Quantum microspaces, space - time quanta of events, can mathematical be structured as a suport medium for quantum waves, em waves, and define space and Time also.

[@nickandrew4650]

The support media are the various quantum fields.

[@ovidiulupu5575]

@nickandrew4650 quantum fields are excitation of some deeper structure. Atoms are structures and have quantum excitation states.

[@petetap4255]

There is some hypothesis that Nodal formation occurs due to the presence of dark matter. However there is convolution that dark matter is present due to the nodes and conversely node are present due to the presence of dark matter. I think this may underpin the probability of existence.

[@ovidiulupu5575]

@@petetap4255 dark mater or inflation After big bang seems unnatural for me. Nature must be simple în a proper paradigm. If theory îs "dark" , i belive that we are outside The road. And The road îs only one and very nerow.

[@petetap4255]

​@@ovidiulupu5575 I feel it is good to consider it akin to the tunneling matrices present in intracellular cytoplasm where cellular functions are able to take place within the endoplasmic reticulum. The macroscope of the microscopic.

[@jamesfarmer-jn4gy]

Probability is a series and parallel connection in combination the orbitals are filtration Someone is either utilizing time travel or we are the computer

[@jamesfarmer-jn4gy]

Did I walk into a parallel universe? It’s time dilation the electron moving at .7c is free energy in momentum the proton is a well of harmonics

[@jamesfarmer-jn4gy]

The photon is the electron its time dilation a Higgs coupling

[@AlphaChinou]

Gag ..this guy I mean come on.

[@alindegren6144]

The coward’s way out.

[@petermerelis]

many worlds is nonsense

[@hakonberg8003]

Ok. Good to have that settled once and for all. 😂 there's a trip to stockholm for you next year.

[@user-yv6xw7ns3o]

Thank you for your well-reasoned discussion of this intellectually challenging topic!

[@garybala000]

He may be onto something. There may simply be one single observable random universe bounded unto itself, self-created and evolving to an end point. The other “worlds” might just be a figment of someone’s quantum imagination.

[@cathyharris-cz5tu]

No, it's not

[@Jgill99911]

100 bucks this guy has bible quotes in his insta bio😂

[@whitemountainblueocean]

How do you know that electrons are waves when nobody saw them being waves all we have seen them as particles 😂😂

[@SpoonsOfApe]

True, how do we know gravity exists? We have never seen it.

[@WilliamHaich]

Double slit experiment. They act just like waves.

[@lepidoptera9337]

Electrons are quanta of energy, momentum, angular momentum and charge. They are not waves. The waves are a classical phenomenon that follows from the geometry of spacetime.

[@levels1937]

Particles don't create interference patterns.

[@lepidoptera9337]

@levels1937 Of course not. Particles don't exist. What creates those patterns is the emptiness of spacetime. Every mathematician who has studied the solution theory of linear partial differential equations can tell you that. ;-)