
20220720: What If We Live in a Superdeterministic Universe?
 01:12: Pilot wave theory, objective collapse models, and even the Many Worlds interpretation all seek to describe a reality that exists sans observers.
 08:04: On the other hand, Many Worlds interpretation of quantum mechanics saves local realism at the cost of requiring multiple realities.


20220420: Does the Universe Create Itself?
 01:59: ... influence as a sort of selection bias  for example, Hugh Everett’s many worlds interpretation and the ideas of quantum decoherence. And then we have ...


20220216: Is The Wave Function The Building Block of Reality?
 03:24: ... example in Hugh Everett’s Many Worlds interpretation, the wave function never collapses, rather lasts forever, ...
 10:19: ... interpretations we’ve discussed — for example, Bohmian mechanics or Many Worlds — objective collapse models can actually be tested. Some tests have ...


20211210: 2021 End of Year AMA!
 00:02: ... get your name right morgan242242 um always thought that instead of many worlds as a way to interpret uh quantum mechanics why don't we interpret it ...


20210907: First Detection of Light from Behind a Black Hole
 16:50: That accent was as unfalsifiable as the Many Worlds interpretation, so there.


20210810: How to Communicate Across the Quantum Multiverse
 01:46: ... the Many Worlds interpretation of quantum mechanics, the universal wavefunction is the ...
 02:22: OK, cute analogy, but perhaps pointless because we don’t even know if Many Worlds is right.
 06:28: ... there. This gives us a sense of why it seems impossible to test the Many Worlds hypothesis  those other worlds by definition have no effect on our own. ...
 07:14: ... after measurement. Does it vanish as Copenhagen demands, or persist as many worlds would have us ...
 09:36: ... telephone, after Hugh Everett  the guy who came up with the Many Worlds interpretation, and John Archibald Wheeler, Everett’s graduate ...
 12:47: ... me a message. I guess he chose a different me. There are, after all, many worlds in the greater Everettian space ...


20210721: How Magnetism Shapes The Universe
 13:47: ... to answer the question where exactly are the alternate worlds in the many worlds interpretation of quantum ...
 13:59: Although fair warning  this will mostly be about many worlds  because there were, appropriately, many comments.
 15:00: In the many worlds episode we asked where are those worlds  but a few of you brought up an equally fascinating question HOW are those worlds?
 15:41: So the answer of many worlds there are is that it depends what you mean by worlds.
 16:49: ... and Master Piece point out that if many worlds gives one world per option, then what does that mean for the different ...
 17:10: ... in the number of worlds for each quantum outcome  because in the many worlds interpretation, an observer is more likely to see the most probable ...
 17:31: ... in likelihood, and therefore probability is not destroyed, so IF the many worlds explanation is right then the number of worlds is weighted by the ...


20210713: Where Are The Worlds In Many Worlds?
 00:00: ... many worlds interpretation of quantum mechanics proposes that every time a quantum ...
 00:35: ... at least this is the popular conception of Many Worlds: that of a manybranching tree, a universe that divides into unthinkably ...
 01:01: But today I want to cover something different  If Many Worlds is true  where exactly are those worlds?
 03:20: ... without being affected by that overlap is how we’re going to create our many worlds. ...
 05:50: The Many Worlds interpretation is rather different.
 07:00: ... not corresponding to our observation of that spot cease to exist. Many Worlds says the wavefunction persists. It says that a cascade of ripples for ...
 07:36: Even prior to hitting the detector screen, we still had many worlds  or at least the seeds of them.
 08:46: ...  and it’s an increasingly favored explanation for both the splitting in many worlds or the apparent collapse in ...
 11:50: Now I’m not saying Many Worlds is right.
 12:14: Many Worlds should also not be taken on faith  we should keep trying to come up with tests.


20210421: The NEW Warp Drive Possibilities
 17:54: ... fields, then according to the ManyWorlds interpretation are there many, many worlds full of very, very lost ...


20210323: Zeno's Paradox & The Quantum Zeno Effect
 10:57: But in the Many Worlds interpretation, the entire wavefunction survives and splits and you split with it.
 11:04: Obviously we’ve talked about decoherence and many worlds before, but let’s talk about what the quantum Zeno effect looks like in this picture.
 11:12: The effect should still exist, because Many Worlds gives the same predictions as Copenhagen.
 11:37: In Many Worlds, that means generating separate realities corresponding to the possible outcomes.


20201215: The Supernova At The End of Time
 15:38: ... the many worlds interpretation the wavefunction persists, so reversing time means ...
 15:49: ... is a timereversed observer from a Many Worlds multiverse, and complains they actually can remember the future, but ...


20201111: Can Free Will be Saved in a Deterministic Universe?
 10:12: In the many worlds interpretation, the future is plural and determined.
 10:24: ... happens or the choices we experience are the process of choosing which many worlds future we travel towards, even if other versions of us choose ...


20201027: How The Penrose Singularity Theorem Predicts The End of Space Time
 13:38: ... or cancel out certain ongoing branches of the wavefunction. Many Worlds says we find ourselves in one of those branches. The problem ...


20201013: Do the Past and Future Exist?
 12:35: ... talked about these ideas before  the Copenhagen and Many Worlds interpretations of quantum mechanics  but soon we’ll dive back in, to ...


20200928: Solving Quantum Cryptography
 06:59: ... wavefunction  or in different parallel realities if you’re into the Many Worlds interpretation of quantum ...


20200527: Does Gravity Require Extra Dimensions?
 14:04: ... quantum multiverse is what you get when you accept Hugh Everett's many worlds interpretation, which implies that the universe splits at every quantum ...


20200316: How Do Quantum States Manifest In The Classical World?
 15:28: ... week we talked about a thought experiment to test the many worlds interpretation of quantum mechanics  quantum immortality, aka quantum ...
 15:47: Some of you would like clarification on how this experiment actually proves many worlds.
 15:50: ... of finding yourself in the rare "survival" timeline the same between many worlds and copenhagen. Well, that depends on your definition of "yourself". If ...
 16:29: ... another Big Bang? In other words  if all possible futures occur in Many Worlds, do some of those lead to new Big Bangs. Well, the key phrase here is ...
 17:40: ... itself defines the probability of a given branch "collapsing". The Many Worlds interpretation states that all branches survive, and the measurement ...


20200303: Does Quantum Immortality Save Schrödinger's Cat?
 01:38: ... the Many Worlds interpretation, which states that those other branches are just as valid ...
 03:03: But in Many Worlds both branches continue forever  and the physicist’s wavefunction also splits into two  I guess into guilty and relieved.
 04:59: But that’s not true in Many Worlds  according to which all branches of the wavefunction persist.
 05:21: ... physicist now has very good evidence that Many Worlds is right because the chance survival under any other interpretation of ...
 05:31: Many Worlds, on the other hand, guarantees their survival in at least one branch of the quantum wavefunction.
 06:17: Keep that in mind before you try crawling into Schrodinger’s box yourself  you’re already testing Many Worlds by just existing.
 06:25: Hugh Everett, who first came up with the many Worlds interpretation, actually believed in this sort of quantum immortality.
 06:51: So the closer you are, the fewer Many Worlds timelines include your survival.
 07:19: ... Many Worlds might be wrong  I say live as though this is your one quantum timeline ...
 12:41: So this explanation works in the context of the many worlds interpretation.


20200224: How Decoherence Splits The Quantum Multiverse
 14:19: ... I would argue that it does  in the context of the Many Worlds interpretation of quantum mechanics, in which there is no wavefunction ...


20161109: Did Dark Energy Just Disappear?
 13:17: I want to respond to some of your thoughts on both colonizing Mars, as well as on the Many Worlds interpretation of quantum mechanics.
 14:24: Okay, on to Many Worlds. A few of you asked how the double slit experiment is actually performed.


20161026: The Many Worlds of the Quantum Multiverse
 06:00: ... Theory of the Universal Wave Function." It's come to be known as the many worlds ...
 06:33: Many worlds says this merging never happens.
 07:07: ... many worlds interpretation invites the idea that reality splits into different ...
 07:53: Both many worlds and Copenhagen create alternate realities.
 08:04: ... superposition of states of many worlds can be thought of as overlayed histories, slices of a universal wave ...
 08:18: ... Many worlds may, in fact, be the more pure interpretation of the mathematics of ...
 08:29: ... many worlds is more economical in the number of unsupported concepts it adds to ...
 09:06: Many worlds may imply that every possible version of you exists out there.
 09:29: There's no more evidence for many worlds than there is for other mainstream interpretations of quantum mechanics.
 10:14: Unlike Copenhagen, many worlds is a deterministic interpretation.


20160921: Quantum Entanglement and the Great BohrEinstein Debate
 11:08: That's the many worlds interpretation.


20160727: The Quantum Experiment that Broke Reality
 10:12: ... the Copenhagen interpretation was freaky, wait until we get to the many worlds interpretation, which we will right here on "Space Time." Thanks to The ...
