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Isn't travelling back in time technically possible? ⏳⏪
MetalAlien
Banned
I'd go even further with (actual) time travel to the past being destructive. You couldn't even open a pin hole and stick a camera through without destroying the present. The very act of creating a pin hole to the past would reset the randomness of the quantum state. It would be like a bomb of randomness expanding from the pinhole at the speed of light.
All the little random quantum fluctuations that effect how real life unfolds would be different because you looked into the past and every second after that moment would unfold slightly different. The present time would be wiped out.
All the little random quantum fluctuations that effect how real life unfolds would be different because you looked into the past and every second after that moment would unfold slightly different. The present time would be wiped out.
DeepEnigma
Gold Member
Time is a construct of man. A flat circle.
There is no past, there is no future, there is only the present; all existing within the same particle space.
There is no past, there is no future, there is only the present; all existing within the same particle space.
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Stouffers
Banned
Improbable for a bunch of reasons, but not “absolutely impossible.”
ZeroZeroQuatre
Member
That's very easy actually : you just have to read the Akashic Records backwards 
King of Foxes
Banned
Dont underestimate my drive to be correct on the internet
O-N-E
Member
First of all, in no way do I believe anything like this is "around the corner". It's a thought experiment.
Second, this localized time travel seems a lot more doable to me than Morty's request from Rick to make something that can save the state of the entire universe. It seems entirely likely that the universe is part of an infinite continuum, and how are you gonna save that?
And what Morty got instead was the parallel universe consciousness version.
Instead, you can experiment on a 30 x 30 x 30 cm space for example and scale up with more resources.
O-N-E
Member
I mean, possibly, but if we're a civilized society, we probably shouldn't do that.
If your idea of time travel is that everything in the universe has to be exactly reversed, I don't think that can ever be in the hands of humans. And even if it were to happen, you wouldn't be witnessing the travel, because if you exist as you are in a time before now, that means the universe wasn't accurately reversed.
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Kamina
Golden Boy
Its not my idead of time travel, its the only real way of time travel. You can only travel through time if time changes for you, while you don't. If you sit outside and watch time reverse in a contained environment you arent travelling. Nor is anything within the changed environment traveling, but just reversed to a previous state.
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O-N-E
Member
Kenpachii
Member
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.
No because time still moves forwards.
rykomatsu
Member
The equation for time dilation:
t = time you as a human observe
t0 = time passed on say....Earth
v = your velocity away from earth
c = speed of light constant
In order for time to even stop (not going backwards in time), you need to hit the speed of light (actually not even...since at speed of light, you get a divide by zero error)
However! In order for you to hit the speed of light:
The equation for velocity given energy:
v = your velocity
m = your mass
E = energy
c = speed of light constant
The square root in this case MUST equal 1. The problem is, no matter how much energy you throw at your mass, the mc2/E value gets infentisimally small, but never 0. As such, the square root can never be 1 since it'll always be 0.999...999
t = time you as a human observe
t0 = time passed on say....Earth
v = your velocity away from earth
c = speed of light constant
In order for time to even stop (not going backwards in time), you need to hit the speed of light (actually not even...since at speed of light, you get a divide by zero error)
However! In order for you to hit the speed of light:
The equation for velocity given energy:
v = your velocity
m = your mass
E = energy
c = speed of light constant
The square root in this case MUST equal 1. The problem is, no matter how much energy you throw at your mass, the mc2/E value gets infentisimally small, but never 0. As such, the square root can never be 1 since it'll always be 0.999...999
- To slow down time to a standstill, you must be traveling at the speed of light
- To be traveling at the speed of light, you must be providing literally infinite energy
- As such, the best you'll ever achieve is super super super slow forward movement of time, never a full stop nor movement backwards in time
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synchronicity
Member
Well, I'm pretty sure time (and space) are mental constructs, so yes, in a sense.
If you've ever done some really deep meditation, you may have had the experience - as vivid as can be.
If you've ever done some really deep meditation, you may have had the experience - as vivid as can be.
O-N-E
Member
The equation for time dilation:
t = time you as a human observe
t0 = time passed on say....Earth
v = your velocity away from earth
c = speed of light constant
In order for time to even stop (not going backwards in time), you need to hit the speed of light (actually not even...since at speed of light, you get a divide by zero error)
However! In order for you to hit the speed of light:
The equation for velocity given energy:
v = your velocity
m = your mass
E = energy
c = speed of light constant
The square root in this case MUST equal 1. The problem is, no matter how much energy you throw at your mass, the mc2/E value gets infentisimally small, but never 0. As such, the square root can never be 1 since it'll always be 0.999...999
- To slow down time to a standstill, you must be traveling at the speed of light
- To be traveling at the speed of light, you must be providing literally infinite energy
- As such, the best you'll ever achieve is super super super slow forward movement of time, never a full stop nor movement backwards in time
Uh... this is quite complex for me, but is this really in relation to the method I was talking about?
Like for instance, you have a hamster in a controlled environment. You begin recording the state of particles in the environment. The hamster dies at day 5, you move the particles to their state at day 1. Hamster is alive now. According to what you posted above, that's impossible?
rykomatsu
Member
That's not time travel.
Tesseract
Banned
the laws are reversible but the process breaks once you establish approximate holds on position and velocity
it's not just a demon problem of quantum uncertainty, there's fundamental limits to reversing wave phase that we've not yet resolved
personal opinion is yes it's possible to nudge the information into placeholder phases that we can interact with, but the failure rate is so ugly as to make any practical approaches meaningless
it's not just a demon problem of quantum uncertainty, there's fundamental limits to reversing wave phase that we've not yet resolved
personal opinion is yes it's possible to nudge the information into placeholder phases that we can interact with, but the failure rate is so ugly as to make any practical approaches meaningless
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Mitsuda Maniac
Member
Everyone knows all you have to do is find a wormhole and jump through it. smh
Tesseract
Banned
more than likely i'd expect a kind of simulation space for time travel
failure rate will improve as more qubits are accessible
something like vr with ever increasing precision and accuracy, where events can be recreated and studied, probabilities examined and tuned as more information is culled
failure rate will improve as more qubits are accessible
something like vr with ever increasing precision and accuracy, where events can be recreated and studied, probabilities examined and tuned as more information is culled
JareBear: Remastered
Banned
Point me to the nearest wormhole. I got my lunch packed. I'm ready to take the jump. See ya'll in 3020.
IntentionalPun
Ask me about my wife's perfect butthole
If only I could, but baby, I can't
O-N-E
Member
What definition of time travel makes it not a paradox then? If the entire state of the universe is reversed, rather than a controlled local area, you won't notice that it was reversed. So that's not really time travel either. If you yourself somehow got a magical genie wish to insert yourself into a previous state of the universe, yet again, that's not time travel, because you weren't part of the equation of the universe you're now entering.
I'm trying to think of what seems like a more realistic approach to time travel.
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rykomatsu
Member
Maybe I'm misunderstanding you...
Even if you were to revert a set of particles to a "prior" state such that it was equivalent to say...its state 5 min ago, it's still done in the context of time moving forward.
Take a basic document revision control system
1. Save a document at t = 1:00pm
2. Edit and save document as revision 2 at t= 1:05pm
3. Restore 1:00pm revision 1 at 1:06pm
Would you consider this information to have traveled back/forward in time?
O-N-E
Member
Locally, yes.
Back / forward is just a concept. Time just means things are in flux. If we remember a state and have the capability, we can return something to its prior form.
But again, what other definition of time travel isn't a paradox?
Airola
Member
Travelling in time in every time travel movie has meant that the future things haven't happened yet to people who are in the time the time traveller travels to.
Would your concept somehow be also capable of erasing all memories and situations from between the time we travel to and the time the travel was performed in?
Even just erasing the memories and situations wouldn't cut it though, as they should become things that never even happened. Changing particles is current time doesn't do that trick.
But yes. Time travel is a paradox and an impossibility. It's not even theoretically possible in any way or form.
We can make elaborate 'stage plays' with authentic sets and everything but that isn't time travel in any sense of its meaning.
All that said, I believe in the actual existence of ideas. There is a realm of ideas and ideas of potential future situations and ideas of past situations that have happened. Getting an access to that can allow these faux time travel things, where you could see future situations and see what happened in the past. You couldn't interact with them though and it wouldn't be actual time travel. But that's one way I could imagine something at least a bit close to time travel happening.
bitbydeath
Member
But it’s not a still image is it? It’s a physical look into the past.
Rentahamster
Rodent Whores
You're gonna have to overcome the speed of light, which at this point, barring some creating outside thinking, is considered impossible.
Rentahamster
Rodent Whores
Being able to look back in time is not the same as actually going back in time and interacting with it.
Rentahamster
Rodent Whores
I doubt it.
bitbydeath
Member
Talking to people from one side of the planet to the other would have been considered impossible at one point.
bitbydeath
Member
Maybe not but the fact that looking into the past is possible at all is incredible.
Airola
Member
No, it's you seeing light that is not the situation, but an illumination. It is just a photograph (or moving pictures if you will) imprinted in space, moving forwards at a certain speed and you are able to take a look in that. The actual situation that you see is long gone. It is a memory of a past thing, the way a picture is. You can perhaps see several pictures in a row, but that just makes it like a movie, many pictures in a row. The actual situation doesn't exist anywhere. At best you are looking at a documentary that happened by accident.
Rentahamster
Rodent Whores
Well yeah, but we weren't breaking any laws of physics to do that.
V4skunk
Banned
But isn't mass the reason why FTL cannot be achieved?
bitbydeath
Member
bitbydeath
Member
But that means there is a memory there to begin with and not a straight timeline with no way back. Seeing the past is miraculous in of itself.
Rentahamster
Rodent Whores
Well, I don't know if there's any one problem, like mass. The only thing that travels as fast as light is light, which has no mass. Tachyons, which are only hypothetical, might have negative mass? However the hell that's supposed to work.
Mostly, according to physics as we know it, it takes infinite energy to travel at the speed of light, so that's a problem. Depending on how you look at the equation, it's also a problem of infinite mass. So unless you have some way to reduce mass to zero, I don't see how we're getting anywhere.
Stretching and altering spacetime seems like a more plausible way of getting anywhere at FTL speeds, but even that is crazy outlandish with our current understanding of the universe.
Phunkydiabetic
Banned
This may be the greatest /thread of all time
lock2k
Banned
I wish I could have save states so I would cheat like motherfucker in the game of life.
German Hops
GAF's Nicest Lunch Thief
I don't get it ?
SKM1
Member
Tachyons have imaginary mass, negative squared mass. If I recall correctly, there are indeed tachyonic particles but they are virtual. They only appear in intermediate process described by Feynman diagrams. They come to existence and decay rapidly, in accordance to Heisenberg's uncertainty principle for energy and time. Now, this is quantum mechanics (quantum field theory to be precise). In the context of special relativity, people claim that incorporating tachyons lead to inconsistencies in the theory. Some people claim that that is not the case and so the problem of tachyons has been extensively studied.
V4skunk
Banned
But this solves the problem.
US10144532B2 - Craft using an inertial mass reduction device - Google Patents
A craft using an inertial mass reduction device comprises of an inner resonant cavity wall, an outer resonant cavity, and microwave emitters. The electrically charged outer resonant cavity wall and the electrically insulated inner resonant cavity wall form a resonant cavity. The microwave...
patents.google.com
US10322827B2 - High frequency gravitational wave generator - Google Patents
A high frequency gravitational wave generator including a gas filled shell with an outer shell surface, microwave emitters, sound generators, and acoustic vibration resonant gas-filled cavities. The outer shell surface is electrically charged and vibrated by the microwave emitters to generate a...
patents.google.com
JareBear: Remastered
Banned
I think I would be pretty rad if the actual solution/invention of time travel ends up happening in this thread.
I believe in you all.
I believe in you all.
Tesseract
Banned
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MetalAlien
Banned
Simpsons did it! Simpsons did it!
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