Nope. Even if some of the theoretical (but still impossible to construct) ideas like wormholes were possible they all tend to come with the same caveat: you can't go back further than when you first build the time machine (wormhole).

>>16958593
No because the past doesn't exist. There is only the present, which is a constant movement of energy and particles advancing into the potential configuations that we call the future, which becomes the present the moment it exists. You can travel to the future, because it exists as potential, and it's just semantics anyway, because we don't "move" or "travel" through time, we just change configuations. You can't return to a past configuration because of entropy and also laws dictating that there is no way to directly, completely copy a quantum state. But say that you could, the only real way to "travel" to the "past" would be to just straight up rewind the universe, moving those configurations back to states which they used to occupy. So unless we somehow invent a machine that reverses all motion in the universe, I don't see it happening.

Or, maybe you believe time is another "dimension" that is analogous to a directional dimension, and that all of time actually exists simultaneously and we just percieve it to go forwards. In that case, we still would have no way to go back anymore than a 2D creature could move in the third dimension. You are asking a molecule of water to decide to start moving back upstream. We are the stream. Whether you percieve it as moving or just a stack of images, there's no logical way to move backwards. To travel backwards in time is to hop out of the dimension we are native to as natively 4D (3D plus one time dimension) beings that we are. Maybe you can petition some 5D alien to pluck you out this part of the time stream and drop you back upstream.

Science is not prescriptive. It does not tell you what can and cannot happen. It only describes a theory which predicts what has already happened.

>>16958616
so your basing this off of jewish math which is obviously wrong.

>>16958619
Do you accept that the rate of time changes?
Like if you are on a rocket ship to another galaxy, or if you are close to a blackhole

>>16958629
Not him but that's like the distinction between a chemical reaction happening very slowly at low temperature vs making a chemical reaction happen in reverse

>>16958629
This is already proven. We know that relativistic speeds and proximity to large bodies of mass warp time. This doesn't change the fact that nothing we know of causes it to go "backwards" and nothing indicates that you can "travel to the past". You can increase the rate at which you move into the future relative to other observers. You can think of this as just upping the rate at which you change your configurations, but you still can't reverse to previous configurations.

>>16958630
This is a good way of putting it. Rate of change can differ, direction of change can't. Entropy can speed up or slow down, not reverse. (obviously there are a few chemical reactions that can go both ways, ignore those for this analogy lol (also ignore that entropy can sort of reverse in small pockets like in life forms and construction, but not overal universal entropy which is what we tend to be talking about when we talk about entropy))

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>>16958632
You say that there is no rewind button in the universe. I am asking if you accept there is a fast forward or slow motion button in the universe, and you do.
So my next question is, do you accept that Wormholes may exist?
Wormholes are based on a special solution of the Einstein field equations. Wormholes are consistent with the general theory of relativity

>>16958635
Yeah I see no reason why they couldn't exist.

No. Particles don’t keep a record of where they’ve been or the other particles they’ve slept with. At best you could make guesses with individual particles about the last interaction or two they had and MAYBE bring a very simple system back to something resembling a state it may have held the past but it wouldn’t be exactly the same.
i.e. you could sort of fake it and get an article on the front page of r/science for a day

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>>16958593
The universe is infinite, so if we are here right now, and the universe infinitely goes out in all directions, then there are probably infinite instances of ourselves out there at different stages of our history. So to time travel you just need to travel out into space long enough in a certain direction

so is it possible or not?

>>16958892
You can recreate a past moment

Specialy light information

>>16958900
how?

you have to go through the future until it loops back around to the past

If going into the past is possible then this just means alternate time ways exist. The multiverse is closer to looking at our own universe in endless different (possible) ways; there is a hypothetical existence for each and every odd out there. Reality is geometric. Either something exists mathematically in odds, or literally so.

>>16958593
there was recently a paper on this.
mathematically yes you can but you'll be stuck in a loop isolated from everything else

>>16959064
>there was recently a paper on this.
link?

>>16958932
The presence of any loop would imply as >>16959064 said of the universe being isolated and ultimately unable of being changed from within that loop. From outside the loop, there are no loops. From inside the loop, it’s all that exists.

>>16958593
Asking someone who is part of space/time to travel against their structure. They either need to travel quantum in their minds or have their bodies matter reverted to like see through light spirits, invisibility to matter, I've seen both.

>>16959131
>They either need to travel quantum in their minds or have their bodies matter reverted to like see through light spirits, invisibility to matter, I've seen both.
qrd?

You do not want to live in a world where time travel does exist. Because it rewinds everything and everyone. So imagine you are hard at work losing weight, or building muscle, or saving money, and someone rewinds time to the point where you are now out of shape and poor again. You have to start all over. I believe that time travel, we would retain a part of it in our memory, would we not?

>>16959132
>qrd?
he's obviously a schizo

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>>16959132
I caught a glimpse one of the first time experiments. I used to take the electric train to work. A group in the future made a tesla electric machine that cast electricity all around them. Two men started to come through with electric bolts all around them. It must have hidden their bodies with the bolts.

>>16959150
sometimes schizos are right

>>16959064
>but you'll be stuck in a loop isolated from everything else
What if we are already in a loop and our entire universe is within a Closed Timelike Curve?

>>16959064
you can't have loops in a chaotic environment
at best you get a strange attractor

>>16958619
>No because the past doesn't exist
Saying photographs don't exist is a level of schizophrenia hitherto unknown.

>>16959330
A photograph is an item existing in a present that is a recording of a past event

>>16959341
>A recording of something that doesn't exist
Back to /x/ with you.

>>16959248
sucks for us

>>16959323
expand

>>16959536
For getting back at the exact same spot in space, you would need smaller than Planck length accuracy. That's not possible.
Assuming it would be the same for time, the discrepancies would add up within the loop and make you drift in spacetime.
And that's only for the dimensional coordinates, I'm not even considering the also chaotic successions of entropic events that could be radically different from one loop to the other.