I have a theory on time travel

[@Spicy Nazami]

Hello everyone.

I wanna share a theory that I been thinking for a long time now.I don't really have people to talk about it because many people are not interested.But I hope U guys can understand it, and I'm sorry about my bad English.Please don't mind it.

Is time travel real? Cuz we never really met with a time traveller yet and it's not just me, all the people around the world. There no official statement or proof that time travel is real. Many people might tried building and tested but never really successed. At least in this time line, no one have successfully created time travel.

And here is my theory,
People never succeed in building time machine.... Or did they? They'll never know, cuz the moment after they build it and push the button to start it... Instantly created two branches. let's say you push the button and created two branches (no.1) is the main branch(original) and (no.2) is the new branch that created right after pushing the button. Your mind... the real you with mind reading this right now will not be transported to the new branch(no.2).

You will still be in this original time line(no.1).
BUT... Because you created a new branch, there will be a copy of you.... Not the one reading right now. Not the one who pushed the button. It's the same you but "not you".


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(Let's change the topic to clone theory... For example you and I are friends. We live our life to the old age and one day you suddenly got into a dead bed scenario.I don't wanna lose you ,So I copy your brain and make a clone , But you didn't died. Then you'll meet the clone of you ,that just like you... Have the same mind as you... But it's "not you".)
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This senerio be like that.. The copy of you succeed in time travel.But the real you (original) didn't. You'll never know that U successfully created branches and, live your life thinking you failed. Only problem is "you will never know". That why there's no proof of time travel in is time line.

The copy of you, that got transported to branch (no.2), He'll be....... Let's say "happy". He is proud of himself that he succeeded in creating time travel. After sometimes he decided to use it again.

"Remember..., He is the copy of original you. But because he used it again, he created new branch(no.3) and a new clone that got transported to branch(no.3). The( no.2) have become the original of the new branch (no.3)."

The(no.2) will stuck in that branch forever, He cannot use the time machine to do anything. Just like the (original no.1).
*Not that the machine got damaged or broken, it's still works but it will just create more branches without the original*
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That is my theory on time travel.I'm sorry if it's too confusing and hard to read.I'm not a writer or have any experience on sharing my thoughts with other people.Please leave your thoughts on this, I would like to discuss with everyone.

 

[Darby]

And here is my theory,
People never succeed in building time machine.... Or did they? They'll never know, [because] cuz the moment after they build it and push the button to start it... Instantly created two branches. let's say you push the button and created two branches (no.1) is the main branch(original) and (no.2) is the new branch that created right after pushing the button. Your mind... the real you with mind reading this right now will not be transported to the new branch(no.2).

You will still be in this original time line(no.1).
BUT... Because you created a new branch, there will be a copy of you.... Not the one reading right now. Not the one who pushed the button. It's the same you but "not you".

That's not a time travel theory. It's a bit of the Many Worlds Interpretation of Quantum Mechanics.

In that interpretation (it has never risen to the level of a scientific theory) there is no original branch, new branch or alternate branch. Based on the explanation of Many Worlds it would be wrong to attach such labels. There are probabilities of outcomes that all play out in different universes. "You" just happen to land in one of those universes which is among an infinite variety of possibilities. Once the branch occurs the person in those other worlds are not you, never were you (they were created at the splitting) and there is no way for you to ever communicate with them directly or indirectly. The inability to communicate is central to the interpretation. If you allow any possibility of communication the interpretation completely fails. The probabilities won't include the impossible - outcomes that, for example, violate some natural law of physics. That means you won't land in a universe where the moon is actually made from blue cheese.

If you graph out the probabilities you might find them arrayed as a Bell Curve. It may well be a strange Bell Curve, however. It most likely will be almost straight up an down line pointing to a single highly probable outcome with the feathered edges virtually flat extremely close to the zero probability line because that's how the probabilities tend to work out in "normal" quantum mechanics. There's a non zero probability that X, Y or Z...infinity will occur sometime before the universe ends...but don't hold your breath because there's a 99.999999...% chance that A will actually occur.

The idea is somewhat popular in internet fantasy land and for a while was a topic among real physicists. It has fallen almost completely out of favor because it makes far too many assumptions that are not known to be true. The big ones are the definition of "observation" and "observer" which also remains problematic in quantum mechanics in general. In all of the Many Worlds interpretations the splitting into multiple universes is brought about by some thing called "an observer" who makes something called "an observation" of a system. But there just isn't a rigorous definition of the terms that the majority accept. People call out Schrödinger's cat gedankenexperiment as an example of how the Many Worlds interpretation really works. The problem with that response is Erwin Schrödinger proposed the solution as a joke, an example of the absurdity of Many Worlds interpretation, not an example of how reality actually works. Put a lethal dose of poison in the box with the cat, wait for a long period of time and, open the box the cat will be dead. The misinterpretation of the experiment fails to recognize at the very least that the cat is an observer.

 

[@Spicy Nazami]

So.. that mean we're stuck in this world.. or should I say trapped.

That's not a time travel theory. It's a bit of the Many Worlds Interpretation of Quantum Mechanics.

In that interpretation (it has never risen to the level of a scientific theory) there is no original branch, new branch or alternate branch. Based on the explanation of Many Worlds it would be wrong to attach such labels. There are probabilities of outcomes that all play out in different universes. "You" just happen to land in one of those universes which is among an infinite variety of possibilities. Once the branch occurs the person in those other worlds are not you, never were you (they were created at the splitting) and there is no way for you to ever communicate with them directly or indirectly. The inability to communicate is central to the interpretation. If you allow any possibility of communication the interpretation completely fails. The probabilities won't include the impossible - outcomes that, for example, violate some natural law of physics. That means you won't land in a universe where the moon is actually made from blue cheese.

If you graph out the probabilities you might find them arrayed as a Bell Curve. It may well be a strange Bell Curve, however. It most likely will be almost straight up an down line pointing to a single highly probable outcome with the feathered edges virtually flat extremely close to the zero probability line because that's how the probabilities tend to work out in "normal" quantum mechanics. There's a non zero probability that X, Y or Z...infinity will occur sometime before the universe ends...but don't hold your breath because there's a 99.999999...% chance that A will actually occur.

The idea is somewhat popular in internet fantasy land and for a while was a topic among real physicists. It has fallen almost completely out of favor because it makes far too many assumptions that are not known to be true. The big ones are the definition of "observation" and "observer" which also remains problematic in quantum mechanics in general. In all of the Many Worlds interpretations the splitting into multiple universes is brought about by some thing called "an observer" who makes something called "an observation" of a system. But there just isn't a rigorous definition of the terms that the majority accept. People call out Schrödinger's cat gedankenexperiment as an example of how the Many Worlds interpretation really works. The problem with that response is Erwin Schrödinger proposed the solution as a joke, an example of the absurdity of Many Worlds interpretation, not an example of how reality actually works. Put a lethal dose of poison in the box with the cat, wait for a long period of time and, open the box the cat will be dead. The misinterpretation of the experiment fails to recognize at the very least that the cat is an observer.

So that mean we are stuck in this world. Or should I say trapped. If there is no way to jump one world from another, I don't think that time travel is possible too. Because time traveling is just going to the past or the future, both of it are not in the world as U.

 

[Harte]

So.. that mean we're stuck in this world.. or should I say trapped.

So that mean we are stuck in this world. Or should I say trapped. If there is no way to jump one world from another, I don't think that time travel is possible too. Because time traveling is just going to the past or the future, both of it are not in the world as U.

Time travel into the future is not only possible, but it has also been accomplished.
But as far as going back... not so much.
Harte

 

[Darby]

So.. that mean we're stuck in this world.. or should I say trapped.

So that mean we are stuck in this world. Or should I say trapped. If there is no way to jump one world from another, I don't think that time travel is possible too. Because time traveling is just going to the past or the future, both of it are not in the world as U.

OK, I'll back up a bit to further explain:

The early models of atoms circa 1909 had little positively charged billiard ball like particles in the nucleus of atoms that were named protons. Orbiting around the nucleus were even smaller negatively charged billiard ball like particles called electrons. It all looked great, like a tiny solar system. But there was a huge problem. Charged particles orbiting other charged particles, according to classical physics, should emit photons, lose energy and spiral into the nucleus in about 10^-11 seconds. Obviously that's not the case. The proof is I'm typing this post.

By 1924 the wave theory of electrons and protons was born (neutrons hadn't yet been discovered). That was a stable theory of the atom, was quantum mechanical in nature, had a wave function and electrons were waves not particles. But problems quickly emerged. When, for example, you put radioactive substances in a cloud chamber and watch what happens you clearly see the "contrails" of particles shooting out from the substance. Schrodinger's Equation predicted that we should see spherical waves being emitted, not little billiard balls. Yet little billiard balls is what were observed. We were back to particles. But how did an electron that was clearly a wave suddenly become a particle?

The "Copenhagen Interpretation" of quantum mechanics emerged. It goes like this: if you don't look at the cloud chamber then the substance will emit waves that you will never see (because you can't look); if you do look you will see particles. Honest, if you drill down the Copenhagen interpretation to its core that's what it says. The Copenhagen Interpretation was then generalized to include all quantum physics events.

And that is what both Einstein and Schrodinger objected to. They both understood and accepted quantum physics. After Max Plank they were both fathers of quantum physics. Einstein's and Schrodinger's Nobel Prizes were for their work in quantum physics. Their objection was that the Copenhagen answer to the problem was just too convenient and didn't make sense. They didn't accept that the role of an observer was so fundamental to physical processes that it boiled down to a wave collapse depended on whether or not an observer looked at a system and that the evolution of the system was completely random and not deterministic. They also objected to the idea that the "classical observer" was somehow not part of the quantum mechanical system under observation. Schrodinger proposed his "Schrodinger's Cat" thought experiment as a satirical rejection of Copenhagen by proposing a preposterous situation. The box enclosing the cat had a wave function, the radioactive substance in the box had a wave function, the vial of poison gas in the box had a wave function, the gas itself had a wave function and the cat had a wave function. Everything had a wave function except, somehow, the observer didn't have a wave function.

In the 1950s Hugh Everett proposed what Bryce Dewitt later called the "Many Worlds Interpretation" Everett desired to resolve the conflict between Copenhagen and Einstein/Schrodinger. In his dissertation he dispensed with the wave function of the electron.and proposed a Universal Wave Function. The box, radioactive substance, poison vial, cat, observer, etc. no longer had individual wave functions. Instead the entire universe had a single wave function. When an observation was made there was no wave function collapse. Instead the universe evolved into as many alternatives as there were allowed solutions - all of the possible outcomes in the wave function decohered into the many worlds. There was a universe for every possible allowed outcome. These universes were completely separate from each other. There was no possible way, even in theory, for them to communicate with each other. There was no possible way, even in theory, to travel between them. If communication or travel between them was even theoretically possible then this interpretation was completely wrong.

In this interpretation there are no dead and alive cats, wave collapse, spooky actions at a distance and no randomness - it is completely local and deterministic. The downside is it is also by its own definition not subject to experimental validation. If all of those worlds are beyond detection and communication then you can't validate their existence.

Many Worlds is not a time travel theory nor is it a theory to allow travel between universes.