Mwi Definition and 130 Threads

Why is it that MWI's problem with special relativity is rarely discussed? From: http://plato.stanford.edu/entries/qm-everett/ A final problem is that it is unclear how to formulate a splitting-worlds reading of Everett that is compatible with the constraints of special relativity. Suppose...

I've been thinking a lot about MWI and probability lately and I can't say desicion theory is very convincing. Obviously if MWI can't derive at the Born Rule, it is falsified. So what do the proponents and opponents of MWI think about this? Do you feel that MWI will ever make sense with...

My first post! Hi there. I am definitely new to this stuff, so as basic an answer as you can provide would be much appreciated (although "basic" and QM are not necessarily friends..) Okay, so MWI hypothesizes that anything that can happen will, and that those happenings occur in parallel...

Could dark matter be the other universes posited by MWI. there has been speculation that the parallel universes remain weakly coupled by gravity after diverging, but we can't observe or communicate with them any other way. that sounds similar to the properties of dark matter, can't observe it...

Hello, i have a question regarding the Many World Interpretation of quantum mechanics and how it explains the entanglement of two particles.. From my understanding, entangling two particles so that an observable of one (es. spin of z axis) is correlated with the same observable of the...

Here I propose a VERY SIMPLE and intuitive argument that MWI, with its MINIMAL set of assumptions, cannot explain the Born rule. The argument goes: The minimal set of assumptions defining MWI is: 1. Psi is a solution of a linear deterministic equation. 2. Psi represents an objectively real...

Would it be accurate to say MWI is holding strong in the preferred interpretation, CI is dying out (if not dead already), and BM is continuing to be accepted by more researchers (or better yet, it is being studied by more physicists now more than ever)?

Is MWI really Bohmian without the non-local factor? Is this the only advantage of MWI?

I can't stop thinking about my poor copies in alternative branches. Because of some weird quantum fluctuations in my brain these copies had attacked people for nothing, killed cops, and now have to serve very long time in prison... Also, I definitely have some injured/paralyzed copies. You...

Is there some term for what I'm about to describe? I don't know if it's a philosophical or probability discussion or what. Take sports leagues, for example. So am I to believe that every permutation of MLB team records occur in that many number of parallel universes? I mean, what are the...

Dmitry, what do you think about the following generalization of MWI? Wave function of the universe depends on the initial condition. Even if one chooses a very simple initial condition, one can still ask - why this initial condition and not some other? So why not ALL initial conditions? Why...

This is similar to an argument made by David Deutsch. The argument appeals to artificial intelligence that can be implemented by a quantum computer. So, the first part of the argument is that however the brain works, it is ultimtely formally describable using a finite number of bits. Therefore...

I've been thinking about the many-worlds interpretation and how one might test it experimentally. I'm wondering if it might be possible to observe interference between macroscopic systems in different "worlds". We start with an isolated quantum system in superposition, and we let it interact...

I'm sure there's been a lot of posts on this before, but even after taking a look at some of them, this experiment is still eluding my understanding. I'm aware that there's no backwards causation--and that the eraser causes interference by random 'categorization'--but I'm nonetheless...

I know that currently accepted theory is that entanglement cannot - and never will - be used to send FTL communications. Leaving that minor detail aside, what I am not clear on is why _quantum_ FTL communication would necessarily violate SR if one believes in MWI. Let's say Cramer's...

Please correct me if i am wrong. As per MWI,when an observer open the box,schrodinger cat will be alive in one world and the same cat will be dead in other world. If we replace the cat with human,then the dead human and alive human will be different worlds.so,my curious question is does this...

Id like comments on this statement because although I see it as true, the fact that MWI isn't generally accepted while QM is suggests it may be false. The way I see it, if QM is an accurate description of the universe (i.e. it is not just an approximation of some underlying theory), then MWI...

Hello everyone, I have spent the last week furiously searching google for explanations of the many world's interpretation of QM. As such I think I have built up a reasonable conception of the theory (for someone at my knowledge level, I am a 1st year physicist) but I cannot for the life of me...

Are other worlds in the MWI existing in adjacent branes? If one could bend the rules as currently defined, and one wanted to journey to another world under the MWI idea, how would you accomplish it? Is this ever discussed? Would it require fabulous amounts of power? Creation of a worm hole...

I've been reading a lot upon the MWI and to my surprise there are more than just 1 interpretation of the "many worlds". I read a article in the skeptical inquirer where the current was found: If all these countless billions of parallel universes are taken as no more than abstract mathematical...

I believe I read that the Everett Many Worlds Interpretation resolves the apparent locality problems with entanglement (i.e. the necessity of a faster-than-light influence to explain the correlations between the behavior of entangled particles). If so I'm not sure how. MWI says that the...

I'm a complete newbie on quantum physics and I don't think my mind is made to understand such complex features of science. Although I've stumbled upon a few MWI articles that has melted my mind down a bit. What I do not understand is, let's suppose MWI is true. Does this state I am...

I have a question regarding branching and clones. If we take a simple single branch from one history into two separate outcomes is there one branch who is the "original" person (and their world) who experienced the moment leading up to it and the second branch a "clone" of the original (and...

make the following device: a stern-gerlach device oriented to the x axis, where +x particles enter a stern gerlach device oriented to the z axis. If a particle comes out of the +z end, the device shoots you in the head, otherwise it doesnt. Its like quantum russian roulette. Anyway, the...

Do MWI and String theory conflict? (sorry--I'm a layman) Hey, Well basically I've been skimming over lots of different multiverse theories and as I don't have a science background (total layman) my question is basically can these two theories co-exist or do they not leave room for each other...

Is this possible?

So, in response to certain experimental outcomes which you SEE, you conclude that you can't trust what you see. Good logic. :smile:

I'm interested in studying LOCAL theories within QM. I have the impression that the following theories claim to be such: MWI (Everett) RQM (Rovelli's Relational QM?) QFT (Originated by ?) LQM (There's a book titled ''Local QM'' as I recall.) + Questions: 1. Are there any other LOCAL...

Hi Patrick. Btw, thanks for all your very interesting posts. That brings me to a question which maybe should be in a different thread (I started a new thread with that question a short while ago but it went unnoticed). Hopwfully it won't be too rude to post it here. Consider an EPR type of...

Hopefully, this caught the attention of VanEsch.. :biggrin: Let's say Bob and Alice do an EPR type of experiment. A gazillion entangled pair of photons is sent to Bob and Alice who are 1000 light years apart. They measure the spin of the photons. They do not know yet that this violates...