Originally posted by Smugallo
It is regarding a theoretical model for time travel or so they say, take a look and see what you think.
I've been studying the hell out of Time lately in trying to understand it for my upcoming podcast, and I have to say, this is a fascinating article.
SpaceDaily's always got some of the best ones. However, I noticed a few problems in it that I'm not sure how Ori would respond to.
from Space Daily
That theory called for the time loop to form as a donut-shaped vacuum, inside which time would curve back on itself, so that a person traveling around
the loop might be able to go further back in time with each lap. A sphere containing non-exotic, but unidentified matter, would in turn envelop the
Later Ori says that dust would be the unidentified matter, and previous to this theory, they thought it'd have to be matter of a negative density.
I'm not entirely sure why, though. It it's relativistic mass they're worried about, they've got bigger problems, because sending a person around
what is effectively a giant centrigue, to the speed of light, would probably kill them.
I suppose what this works on, instead of speed, is gravity. But the gravitic forces required to create enough gravity to bend time in on itself would
be so massive, I'd think those would crush the human as well as probably suck the entire planet up along with it.
This creates the practical problem of a gravity barrier that cannot be crossed, but supposedly Ori has found a way to nullify that problem with "a
protected core". Shielding from the effects of gravity are beyond my comprehension, else I'd think it'd already have been utilized in an industrial
capacity for creating rare earths.
Further, since all current evidence leads to the assumption that gravity is the 11th dimension, rather than a field, I don't even know that it
be shielded against. It'd be like trying to shield against height, or width, or length.
But, on the remote possibility that one could
shield against gravity, wouldn't this then negate the very effect they were looking for? The
core might loop time in on itself, but this effect would then be lost to the person moving about the interior of the donut.
from Space Daily
"If the proper initial conditions were achieved, the time machine would evolve on its own without any further intervention," says Ori, of the
Technion Faculty of Physics. "It can be likened to shooting a ship with a cannon. Once the cannon is aimed properly and fired, the cannonball hits
the ship on its own, driven solely by the laws of physics."
I don't know that this would necessarily be correct. Machines do not evolve without outside intervention, because they cannot breed selectively. I
think what he's maybe assuming is that humans would continue work on the Time Loop in their present time, and that because of the closed-time loop
properties, that this would give the effect of improving the donut throughout previous time and future time. Meaning, any changes made to the time
loop throughout its entire existance would exist the instant after activation.
Two big problems with this that I can see.
1.) This also includes the eventual -destruction- of the time loop. Since everything eventually breaks down due to entropy, there will come an
eventual point in time at which the physical donut is destroyed, either by man or nature's hand. This moment, too, will propagate along the entire
timeline of the donut. what this unforutnately means is that as soon as the donut is activated, if it is truly successful, it would immediately be
destroyed by it's own eventual end.
2.) This entire theory assumes that time is not only linear, but that it is also a constant. All present evidence points to the contrary. Time is
relative to the observer depending on the speed travelled and distance travelled.
from Space Daily
"The machine is space time itself," he explains. "If we were to create an area with a warp like this in space that would enable time lines to close
on themselves, it might enable future generations to return to visit our time. We, however, could not return to previous ages because our predecessors
did not create this infrastructure for us."
While I do believe we'd need the infrastructure to exist as an "anchor point" for time travel before future generations can travel backwards as far
as that anchor point, we might eventuall learn how to throw an anchor point further back, or operate without one. I don't see that happening without
this first stepping stone, however.
By creating a closed loop, though, I think while it might be possible to create a closed loop of time, I think the prospect of entering it and leaving
it more than once might prove impossible. Assuming it doesn't immediately destruct due to the "all points along the entire timeline of the donut
time loop existing at once", problem, perhaps due to the tightening of the loop to the moments just after activation and just before destruction,
which could, in fact be solved, this still leaves the problem of every moment in that loop of time existing forever (or until the donut is
So the first test subject who walks in, leaves a trail of themselves, probably looking like a very strange play-doh snake with a cross-section shaped
like himself, which would perpetually exist. The moment his foot touched down would exist forever, so would the next step, and all intermediate
movements. Even after he exited the loop, were it possible, a nearly infinite number of himself would remain as a sort of smeared, overlapping trail,
that would act as a physical barrier to the next test subject to walk through it, and so forth.
Further, this brings into existence the problem of two seperate masses occupying the same space at the same time, should the two come into contact.
Would it create antimatter? Would it result in an explosion? If this destructive collision, or overlap was the eventual outcome of such an attempt at
a time machine, it would happen almost instantly after creation of it, and it would create an explosion along the entire timeline of that donut's
So if the "time donut" existed for 50 years before a matter/antimatter, or some similar type explosion occurred, it would, I would think, create an
explosion that lasted for 50 years... that's a daunting thought.
I just don't know that closed time loops are the best approach to time travel. It seems way too risky, assuming it could even work in the first