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Opinion Clickbait Isn't travelling back in time technically possible? ⏳⏪

O-N-E

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The state of matter can change due to the forces exerted on them, but if you had the computing power to analyze and store the exact state of every particle within a certain perimeter, then had the right amount of force and accuracy to change each particle's state and position back to a previous one, isn't that essentially time travel within that perimeter? The more mass, the more energy this requires and more complexity requires more computing power and accuracy.

It would certainly be an insane setup, but it seems technically possible.



I'm not going to ask an actual physicist though, cause every time I do they roll their eyes and yell about the speed of light or some shit.
 

jshackles

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An interesting idea, but wouldn't the time travel be limited then only to when you first started mapping the state of each particle in your controlled environment?
 

Airola

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To be able to travel back through time would require history physically existing somewhere.

You could perhaps create a copy of the state the world used to be in, if there would be some way to change atoms at your will, but you would still be in this current time. It's not time travel, it's just some really obnoxiously autistic way to make a fully accurate period piece setup.
 

O-N-E

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An interesting idea, but wouldn't the time travel be limited then only to when you first started mapping the state of each particle in your controlled environment?
Possibly. That in itself would be powerful, but maybe if you can measure the force and directionality of everything in the perimeter, you can then accurately reverse engineer a previous state. Rules are rules after all. This can probably be tested with a simulation. Code some objects with forces acting on them. Get an AI to accurately spit out the exact state of each object in a previous timeframe.
 

Riven326

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Why do these limits exist in the first place? Why are there any laws at all? There shouldn't be if the universe came into existence out of chaos.
 

O-N-E

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The many worlds idea. Since traveling backwards in time would always cause a paradox they think it's a parallel world and not really the universe you came from. So you could kill or fuck anyone you like it won't change your original timeline.
Hmm... I think that's just a different time travel idea. Like transferring consciousness to a different reality (if it exists).

I'm talking about rearranging the current reality within an amount of space that's proportionate to your current technological capabilities.

Why do these limits exist in the first place? Why are there any laws at all? There shouldn't be if the universe came into existence out of chaos.
Well, that leads to another discussion entirely, but I'm definitely in the camp that doesn't believe in the random happenstance take on how this all came to be.
 
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MetalAlien

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Hmm... I think that's just a different time travel idea. Lie transferring consciousness to a different reality (if it exists).

I'm talking about rearranging the current reality within an amount of space that's proportionate to your current technological capabiities.
Sorry yes your idea is like going back to a previous save point in a game...if the universe is indeed a simulation I don't see why it wouldn't work.
 

Riven326

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Well, that leads to another discussion entirely, but I'm definitely in the camp that doesn't believe in the random happenstance take on how this all came to be.
I think the possibility of time travel makes sense no matter which theory you believe. Both the big bang and creation theory are supernatural. The universe appears to be governed. But I've always wondered what exists beyond the universe and what rules exist there, if any.
 

MetalAlien

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What you are asking could save a lot of time and trouble. You could do it locally. It wouldn't have to be the whole universe. Rearrange the atoms of earth or our solar system, or even out galaxy to the pattern they were at a given year. You would have to be a god like being to do that and be able to know stuff like the location and momentum of particles.

The people of earth would figure it out once the light of the original state reached the new state. They would know something is wrong.
 
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Durask

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The state of matter can change due to the forces exerted on them, but if you had the computing power to analyze and store the exact state of every particle within a certain perimeter, then had the right amount of force and accuracy to change each particle's state and position back to a previous one, isn't that essentially time travel within that perimeter? The more mass, the more energy this requires and more complexity requires more computing power and accuracy.

It would certainly be an insane setup, but it seems technically possible.

I'm not going to ask an actual physicist though, cause every time I do they roll their eyes and yell about the speed of light or some shit.
It is not time travel, is is making a copy of that particular time state. You are still in present time.
 
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Twinsanity

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Entropy can decrease locally as long as the system as a whole increases.
If you increase the size of the system you increase the amount of entropy in that system. Assuming we're talking about a closed system here.

Entropy cannot decrease in a closed system. In an open system entropy can decrease through heat leaving the system but I don't think the OP is talking about an open system.
 

MetalAlien

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If you increase the size of the system you increase the amount of entropy in that system. Assuming we're talking about a closed system here.

Entropy cannot decrease in a closed system. In an open system entropy can decrease through heat leaving the system but I don't think the OP is talking about an open system.
Well in my variation of the OPs idea I pointed out you could do this locally and not have to involve the whole universe.
 

O-N-E

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If you increase the size of the system you increase the amount of entropy in that system. Assuming we're talking about a closed system here.

Entropy cannot decrease in a closed system. In an open system entropy can decrease through heat leaving the system but I don't think the OP is talking about an open system.
What do you mean?

I'm talking about a local area in our universe that is thoroughly analyzed and using the exact material there and outside energy / force to reverse to a previous state.
 

neobiz

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You would think so

To move matter to it's state in whatever "time" you want would take a buttload of energy wouldn't it?
 
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Tesseract

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principally possible, practically impossible

we do not have perfect knowledge of the wave function of many-electron systems

there's too much noise (spread state is not reality)

many-electron systems will guarantee fail most or all antisymmetrization procedures, i've run the simulations
 

O-N-E

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principally possible, practically impossible

we do not have perfect knowledge of the wave function of many-electron systems

there's too much noise (spread state is not reality)

many-electron systems will guarantee fail most or all antisymmetrization procedures, i've run the simulations

Where’s the starry eye’d react when you need it?

One of these days soon, you’ll pass on these knowledges to me.
 
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MetalAlien

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principally possible, practically impossible

we do not have perfect knowledge of the wave function of many-electron systems

there's too much noise (spread state is not reality)

many-electron systems will guarantee fail most or all antisymmetrization procedures, i've run the simulations
Maybe it doesn't have to be a quantum duplicate? The whole point of this is to reset everything back to an older time from our point of view. Maybe an approximation would be good enough?
 
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MetalAlien

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They just recently added another nail to the coffin of the simulation theory but think about it this way. How can we say something is impossible and claim it's just a simulation at the same time?
 
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Tesseract

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a great computer could prolly adequately simulate the past, resolution would improve as epistemic y aleatoric probability theories gain enough structure to leverage the energy of various vacuum states
 
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Cato

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The state of matter can change due to the forces exerted on them, but if you had the computing power to analyze and store the exact state of every particle within a certain perimeter, then had the right amount of force and accuracy to change each particle's state and position back to a previous one, isn't that essentially time travel within that perimeter? The more mass, the more energy this requires and more complexity requires more computing power and accuracy.

It would certainly be an insane setup, but it seems technically possible.



I'm not going to ask an
actual physicist though, cause every time I do they roll their eyes and yell about the speed of light or some shit.
Has nothing to do with speed of light.
Werner Karl Heisenberg can explain why your approach is impossible. He actually won a Nobel price that is very relevant to this.

You also have the issue with "running time backwards" in that there are infinitely many initial states that can lead up to the same ending state. It is akin of running "the addition operator" backwards. The sum of three numbers is 27. What were the initial numbers?
 
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triplestation

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time is nothing but a tool to measure the difference between moments its so weird to think about, you can track movement with that shit

i guess on paper you can go back in time with math but you cant manipulate the motion of the existence we know

the best you can do artificially for a mere sensation of time travel is watch recorded events reoccur on film
 

Lanrutcon

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Snapshotting reality: by the time you have the tech do it, you wouldn't need time travel anyway. Who cares about the past when you can reshape the present?
 
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But if you knew where people were at different points in the past and their actions/outcomes.

Couldn’t you build a simulation to enable you to look back at these points and the actions and with enough of these ‘events’, you could build that world ?

(Kinda like running things backwards, rather than forwards when watching something like a simulation building a city or world scene)

But that’s just looking back, getting there may mean understanding other dimensions that if they exist, we currently have no concept or understanding of

Or finding some sort of particle or matter that travels backwards through what we know as time. Then somehow ‘hitching a lift’
 

NeoIkaruGAF

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To be able to travel back through time would require history physically existing somewhere.

You could perhaps create a copy of the state the world used to be in, if there would be some way to change atoms at your will, but you would still be in this current time. It's not time travel, it's just some really obnoxiously autistic way to make a fully accurate period piece setup.
I’d still be happy with that.

I have no interest in actually being in the past and interacting with it, but being able to recreate past events in present time would allow us to have accurate records of history and lost human know.edge and art.

And just imagine the infinite potential for the porn industry... :messenger_beaming:
 

bitbydeath

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I’m going to say going back in time is possible and I don’t believe in multiverses.

In fact you can see the past when looking up at the night sky and you wouldn’t even know it. The further objects are away from you the further back in the past they actually are.

Scientists have claimed that aliens 65 million light years away could look at Earth today (providing they had some damn good telescopes) and see Dinosaurs still roaming.

I believe there is something in that which if the past can be seen then it is only a matter of time to figure out how it can be reached.
 

Airola

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I’m going to say going back in time is possible and I don’t believe in multiverses.

In fact you can see the past when looking up at the night sky and you wouldn’t even know it. The further objects are away from you the further back in the past they actually are.

Scientists have claimed that aliens 65 million light years away could look at Earth today (providing they had some damn good telescopes) and see Dinosaurs still roaming.

I believe there is something in that which if the past can be seen then it is only a matter of time to figure out how it can be reached.
But it's past just as much as you looking a photograph taken 50 years ago is past.
 

#Phonepunk#

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i think shows like Rick & Morty and pop sci fi have convinced people that a lot of miraculous technology is right around the corner

like for real you will hear people talk about uploading brains and making clones of people and teleportation and stuff, as if science will make all that possible. people may not believe in magic or religion anymore but they do have a bunch of faith in a techno utopia waiting just around the corner.

as with anything, ill believe it when i see it
 
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