[QUOTE]ead author and PhD student Martin Ringbauer, from UQ’s School of Mathematics and Physics, said the study used photons – single particles of light – to simulate quantum particles travelling through time and study their behaviour, possibly revealing bizarre aspects of modern physics.
“The question of time travel features at the interface between two of our most successful yet incompatible physical theories – Einstein’s general relativity and quantum mechanics,” Mr Ringbauer said.
“Einstein’s theory describes the world at the very large scale of stars and galaxies, while quantum mechanics is an excellent description of the world at the very small scale of atoms and molecules.”
Einstein’s theory suggests the possibility of travelling backwards in time by following a space-time path that returns to the starting point in space, but at an earlier time-a closed timelike curve.
This possibility has puzzled physicists and philosophers alike since it was discovered by Kurt Gödel in 1949, as it seems to cause paradoxes in the classical world, such as the grandparents paradox, where a time traveller could prevent their grandparents from meeting, thus preventing the time traveller’s birth.[/QUOTE]
[IMG]http://www.science.uq.edu.au/images/news/time-travel.jpg[/IMG]
[highlight]Source:[/highlight] [url]http://www.science.uq.edu.au/index.html?page=212544[/url]
No tachyon manipulation? I am disappoint, but I guess we haven't advanced far enough for that, even though it might be purely hypothetical.
my mind was just blown
Hoorah!
I don't want time travel to be a thing. Science fiction, and people in general, have terrified me of what could possibly go wrong involving time travel.
Don't get your hopes too high boys, I bet that around post 10 someone from the Facepunch's science team will come to this thread and explain how the article is unprofessional and the time travel achived this way is of no use to anyone because of some quantum phisics catch
I will die because of some ass hole and time travel.
[QUOTE=Take_Opal;45254104]I will die because of some ass hole and time travel.[/QUOTE]
Impossible. Because that would mean you would not be posting here.
So if time travel WAS possible, we would have known by now.
[QUOTE=Valiantttt;45254119]Impossible. Because that would mean you would not be posting here.
So if time travel WAS possible, we would have known by now.[/QUOTE]
maybe they just didn't kill him yet
though unless he was destined to be some sort of John Connor, why would they bother unless he saw something he shouldn't have?
this article is unprofessional and the time travel achived this way is of no use to anyone because of some quantum phisics catch
edit: i am not part of Facepunch's science team
But...Causality...
I like to cling to the hope that the multiverse theory with time travel is true which is why we have seen no evidence of it existing.
[QUOTE=Valiantttt;45254119]Impossible. Because that would mean you would not be posting here.
So if time travel WAS possible, we would have known by now.[/QUOTE]
Actually it would happen in a different timeline. Time travel (at least back in time) is impossible without entering another timeline, which prevents paradoxes.
I think (mostly guess, haven't really done any research on this) this would also imply you need a second time dimension for time travel.
[QUOTE=Darkwater124;45254199]Actually it would happen in a different timeline. Time travel (at least back in time) is impossible without entering another timeline, which prevents paradoxes.
[/QUOTE]
Why?
[QUOTE=Darkwater124;45254199]Actually it would happen in a different timeline. Time travel (at least back in time) is impossible without entering another timeline, which prevents paradoxes.
I think (mostly guess, haven't really done any research on this) this would also imply you need a second time dimension for time travel.[/QUOTE]
Not just a second dimension there would have to be one for each possibility of everything. Oh well i'm content knowing that no one knows yet, probably. It's not like SERN is actually a thing.
[QUOTE=Angus725;45254145]But...Causality...[/QUOTE]pffffft who cares about rules
[QUOTE=Darkwater124;45254199]Actually it would happen in a different timeline. Time travel (at least back in time) is impossible without entering another timeline, which prevents paradoxes.
I think (mostly guess, haven't really done any research on this) this would also imply you need a second time dimension for time travel.[/QUOTE]
I suppose you base this on your previous experience with time travel, yes?
Time travel is a funny thing, the grandparents theory is strange to me, what if your going back was the reason for them being together in the first place? Also if said traveller changed their grandparents mind and they didn't have travellers parent, would said traveller exist as he would be travelling on a parallel line of time to the new one he has created? But then that brings in the whole parallel universe theory. Hell maybe time travel is taking place right now and the world is being fixated to one path or multiple variables to someone's own ends. Like I said time travel is a funny thing, I wouldn't mind a Tardis though
Fuck time travel comes closer just DON't ASSASSINATE HITLER just look what happened in Red Alert?
[QUOTE=paul simon;45254357]I suppose you base this on your previous experience with time travel, yes?[/QUOTE]
[I]do you really want to know the answer to that?[/I]
[QUOTE=Krinkels;45254319]Why?[/QUOTE]
Generally being that time travel in the sense of classical mechanics sort of violates causality, but is theoretically possible in a quantum universe model where there are ambiguous and simultaneous branching versions of reality. If the latter is true then going back in time would just cause yet another "branch-off" of that creates it own ambiguous state of reality independent of those that have already been (sort of) established.
Classical mechanics is good for predicting small scale physical interactions in anomaly-free 3d space but it's a shit and overly-simplistic model for explaining just about anything else (like gravity and time dilation) that's what Relativity and Qauntum Mechanics are for.
This is probably a bad explanation since I just sort of regurgitate information telephone-style, but this is the gist of it IIRC. Time travel is technically paradox-free in quantum universe models
[QUOTE=Leg of Doom;45254407]Fuck time travel comes closer just DON't ASSASSINATE HITLER just look what happened in Red Alert?[/QUOTE]
Mmmm, as a baby or what?
the article only talks about a simulation of time travel and showing the closed timelike curves (time travel which is self consistent - i.e. the traveller has always travelled back in time) can exist in a quantum + classical world, not that it is actually possible to achieve
[QUOTE=hypno-toad;45254429]Generally being that time travel in the sense of classical mechanics sort of violates causality, but is theoretically possible in a quantum universe model where there are ambiguous and simultaneous branching versions of reality. If the latter is true then going back in time would just cause yet another "branch-off" of that creates it own ambiguous state of reality independent of those that have already been (sort of) established.
Classical mechanics is good for predicting small scale physical interactions in anomaly-free 3d space but it's a shit and overly-simplistic model for explaining just about anything else (like gravity and time dilation) that's what Relativity and Qauntum Mechanics are for.
This is probably a bad explanation since I just sort of regurgitate information telephone-style, but this is the gist of it IIRC. Time travel is technically paradox-free in quantum universe models[/QUOTE]
Just tell him to go watch the Star Trek episode Mirror, Mirror.
I for one would board the multiverse theory. If you change the past there's just a new timeline alongside the original, THANKS DRAGONBALL Z
Yep we did it, because Dave over there came back to tell us that it worked
If time travel was possible in the future, everything that has been effected by it in our past has already happened. Even if Hitler was assassinated or led to victory, that would be an alternate timeline separate from our own.
So have no fears... yet...
[I]Great scott.[/I]
If its possible, how come we haven't seen anyone from the future?
[QUOTE=Baron von Hax;45254652]If its possible, how come we haven't seen anyone from the future?[/QUOTE]
Because anytime someone sees them they just go pack into the past and warn themselves of the situation where they have been seen
duh!
Sorry, you need to Log In to post a reply to this thread.
