David Deutsch - Many Worlds of Quantum Theory

More David Deutsch, please! It turns out he has a very unique view of the world!

Closer to truth is one of the best things on the internet! It is exercise for our brains

Thank you. David Deutsch is a personal hero of mine. An interview I saw with him, about 24 years ago, left me feeling vindicated about a debate with a college professor. The argument was about possible mechanisms for single photon interference, after I was first shown the experiment in summer of 1988. He believed the notion of photons interfering with parallel counterparts, in "virtual" universes, was ridiculous nonsense.

"I existed first and went down every path. I am the abundance of Light I am the remembrance of Fullness." - Apocryphon of John, 2nd Century A.D.

Out of 451k subscribers, only 13k watched this video in 2 days, and even sadder, only 538 people liked it. This is one of the very few top class YouTube channels. I wonder what's happening to human intelligence and knowledge.

Does making a choice produce energy, how much? What is the mechanism behind it? How much energy do you require to create a universe or to branch a new timeline?.

Ah now we're getting "closer to truth". I completely agree with David's theory. I've always felt there is so much more going on around us in our everyday lives than we can even begin to imagine.

that explanation about solid state of matter is mind-blowing

Doesn't every child imagine this? If I am dancing in one reality forever, I am happy while I live in this one because I know one part of me is dancing. If I am exploring nature in another reality, ditto. And each life is interacting with me in this and vice versa and so I grow from it and increase my understanding. Sometimes we see this in dreams and daydreams, visions, and experiences that we can describe as otherworld. Life in one reality is far too short for our imaginative lives to conceive of it's limitations without creating in another. How many are there? How many cells there in our bodies, and how many times do they renew themselves? It is limitless. Life is wonderful

For those already initiated in QM I repeat here some comments previously made to similar videos. They may clarify several pending matters. The Schrödinger time dependent equation (STDE) when applied to a wave representing an initial state of, say, an electron bound to a proton and together forming a hydrogen atom, predicts and retrodicts all the future and previous states of the electron wave, in the same fashion than the evolution equations of classical mechanics predicts the movement of the Earth around the Sun. Note that the STDE is energy conservative, that is, the initial state as well as the predicted and retrodicted ones all have the same energy. As is well known the bound electron has a completely different conduct. Whatever the initial state and in absence of other interactions an excited electron will settle in a stationary state radiating energy (in the form of a photon) along the way. If the stationary state is the ground state the electron will stay there forever (in absence, as said before, of other interactions). Otherwise the stationary electron state is ephemeral and will be abandoned to radiate a photon and assume a new stationary state of even lower energy. This "down the staircase" process repeats until the ground state is reached. There is no manner to adapt the STDE to this physical process. This inconsistency was discovered by none other than Niels Bohr, as can be inferred from the report of Werner Heisenberg. See our note https://www.researchgate.net/publication/356193279_Deconstruction_of_Quantum_Wave_Mechanics After discovering the tremendous inconsistency between the equation and the atom it would have been natural to announce that the STDE contradicted physical facts, and ask for a correct equation. I assume as true, but only know from hearsay very long ago, that in Einstein's viewpoint the correct deterministic time dependent wave equation had to be non-linear in contrast with the linear STDE. References to this historical detail would be appreciated. It is hard to believe but, against reasonableness and common sense, Bohr decided to adopt the STDE as correct and that continuity, causality and determinism of physical processes were wrong because they contradicted the STDE. Apparently mathematical equations on paper were more relevant than the experience of the whole human race. Then a series of new and fanciful "quantum physical principles" were adopted. In my opinion the powerful quantum establishment dogmatically defends Quantism and strongly rejects any attempt to correct its misdeeds, even if the correct deterministic time dependent wave equation is available. With best regards to all Daniel Crespin

fascinating discussion, and huge thank you for the questions you asked.

The Many Worlds had always seemed like the most intuitive interpretation; however I'm only an "armchair physicist". When I first learned of the double slit experiment--and the resulting interference pattern--it seems obvious that it would require something very "real" to have interference. It's puzzling how someone could expect a photon to interact with a "possibility".

With yesterday's interview as a point of reference - "How Does Beauty Color the Universe" - this episode is its flip side. There is little about any of the multiverse interpretations that provides clarity, demonstrating neither symmetry nor simplicity. Worst of all, given their enthusiasm, you would expect a multiverse interpretation to provide some account of the entropy problem, but it does no such thing. The entropy problem still lurks in the background, still demanding to be taken seriously.

I was thinking about this very subject the other day, and came up with a similar theory, and come to the conclusion that every millionth or less of a second we are splitting off in different universes, and always have.

I am an amateur interested in the computer simulation of quantum mechanics making use of a random number generator. I would like to give up my day job and buy a flashy new computer so I can work full time on it. If MWI is true, then there is a world where I win the National Lottery every week. Any assistance in locating it would be appreciated.

If I understand what he is saying, there are other realities that interact with us concurrently without our noticing their existence. This to me is evidently true. For example, before the advent of radio communication, people hardly knew that there is radio wave within nearly everything. Another example is the suspected "dark energy." In the future, we may discover other things or phenomenal that we do not at present think exist. Whether that will be in the quantum field, we wait to see. As for calling it multiverse, that is a choice of words.

David's flailing arms helped tremendously

I tend to agree with everything he's saying. A brilliant mind, he has.

So either there are trillions of new universes exponentially created every single moment as all living things make minor decisions in their daily lives and so on in each of the newly created universes ad infinitum, OR there is an error in the arithmetic. Is that the situation?

What causes branching of many worlds? Does the cause of branching of quantum wave function give an an indication of what started quantum wave function?