Concept: Differential Time Theory

I'm not touching this subject with a ten-foot breaching spear

Time travel is too freaky for my fragile mind to even contemplate, as I cannot imagine what would happen if someone from the future would change the history to such an effect that it effected them as well.

The Back To The Future trilogy was entertaining and all, but to make it possible to travel back in time in 40k, one is forced to make fantastic assumptions which probably don't make sense at all.

But then again, I'm no scientist

Mmmm I don't actually believe the principle of time should really be used for the warp, time is a constraint placed on our universe the warp is timeless, which is why two days in the warp may be 2 months in real space. Its inconstant but does not go backwards in my opinion. You would have to have great power to manipulate the warp itself, change it so you could go back in time. This can be done by chaos but i don't believe it is a naturally occuring phenomena that you just wonder into.
Including the big bang theory is somewhat risky as we don't really know what happened. For all you know the warp could be whats outside the universe all universe's for that matter and so the big bang might have no impact on it what so ever or dropping into it might not not actually be possible as the there wasn't actually a universe to drop into. Or if the warp and our universe were both created then, then there wouldn't be a warp at the time of the big bang as it had'n t been created yet so you would be dropping out of nothing into nothing
Time travel give's me a headache

What happened there, must've been some kinda warp anomally

Then lets say this, time is linear in real space but the warp affects the percieved flow by altering the rate at which time flows for an object within the warp, the dead pools are a good idea. Thse would be regions where the passage of time is most altered, the points at which time slows the most in the warp. so 1 day in the dead pool could mean a passage of time in real space of millenia. Time travel of a sort but only in one direction

I've never yet heard of an instance where a ship dropped out of warp before it entered, so thats why i'm assuming that the warp only slows the rate of time flow

Perhaps this is a candidate for a multi dimensional approach to the warp. If you did drop out before going in rather than being erased you are trasferred to a reality in which you don't exist so maintaining the balance and making sure there'e not two of you in one universe at the same time

From what I know the time is not constant, the time-space is. Because we can measure time only from space and space only from time.
The idea of pool is quite plausible hypothesis.

I disagree with this. You point on Execution hour I guess, but think why Mortarion hasn’t turned off the field but suffered until succumbed to Nurgle. Plus how space hulks w/o Geller go in/out realspace?
On past – future travels. There is mention that sometimes ships came before they gone, in RT maybe, I cannot recall the source. On other way about time travel get Heinlein we all zombies short story for great read on subject. I may even drop it to you if needed.

I do not believe what we define as time exists in the warp. Scientists normally term time as the Fourth Dimension (due to Einstein’s theories). The first three dimensions are the physical dimensions which we can perceive; length, width and height. Each dimension can therefore be thought of a strand or a defining factor of our reality.

NOTE: It may be erroneous to call time the fourth dimension. There may exist other physical dimensions that we are just unable to perceive. If you are having difficulty conceptualizing how this could be possible, I recommend giving Flatland by Edwin Abbott a read. The story discusses the interaction of a two dimensional being with one that exists in three dimensions.

It is erroneous to equate time with chaos. Time is more a dimensional value of “duration”. Chaos has more to do with the effects of entropy on a system. Time merely provides a determination of how long it takes for that system to break down. Time is also not a constant. It does not flow at the same "speed" everywhere. Its rate of progression is affected by how quickly an observer happens to be moving. Time also begins to break down around massive gravitation wells, such as would be found around a black hole.

Of course anything that falls into the black holes event horizon would eventually be drawn towards the singularity at its center. The singularity is a point, where space and time cease to exist, and matter is crushed to infinite density. This is the typical black hole, but if the black hole is rotating, the singularity forms as a ring rather than a point (found by New Zealand mathematician Roy Kerr). It is therefore possible to dive through this ring and emerge at another place or theoretically another time.

This is how I see the standard warp engine working. The engines create a strong enough gravitational field to produce a singularity and use it to jump out of our reality and into the warp. The reverse is done in order to re-enter our reality at another point. It is theoretically possible to use a wormhole to move temporally rather than physically. In the fluff on the webway, it is written that there are place in which time actually flows backwards or almost at a stand still. It may be that the webway is a giant network of interconnected wormholes (this is the theory that I ascribe to at least). If that is the case, this might explain these webway corridors where time flows backwards.

Now the question may arise if time flows differently in the webway, why not in the warp. The webway is still connected to our reality unlike the warp. It may be that the webway runs through one of the higher physical dimensions that I alluded to earlier. The warp on the other hand is separate and distinct from our reality and is therefore not subject to the laws of our reality. The geller field that ships use while traversing the warp can be thought of as an integrity field, which enforces the laws of our reality throughout the ship. This is why time still passes while the ship is in the warp.

The time dilation effect that some ships encounter while traversing the warp might arise from several variables.

1. Time Distortion Cause by Drive System

Generating the singularity that enables a ship to “jump” into the warp causes a large gravitational well. Inside of the field time will begin to pass at a different rate than it does for outside observers (similar to how objects appear to slow down when entering the event horizon of a black hole. This may also help to explain some of the stories of how ships appear before they have left. Much of the information we gather is based off of the visual light spectrum or energy emissions that would be effected by the distance or a strong gravitational field.

The light from distant stars as seen through telescopes are said to be from the past, because the light and radiation we perceive now, actually was emitted by the star centuries ago (depending on distance). The light or radiation emissions that allow us to perceive objects in the event horizon of a black hole may have been emitted some time previously (depending on the strength of the gravity well). A ship transitioning or jumping through the singularity to the warp may have already left while the after image of it remains while the gravity well dissipates. If the jump is of short enough duration, it may appear that the ship is arriving before it left its destination, but the image of the ship at the departure point is actually just a temporal optical illusion.

2. Effects of Reality on Warp

In its natural state, time does not exist in the warp. The way I view the warp is as the interaction point between reality (realties) and the void. The basic form in which matter exists is as pure energy? All matter if broken down releases energy as the bonds that hold it together are broken. What we call reality is therefore energy locked into specific shapes and forms. In its natural state energy is formless. As the warp can exert influences on “real space” so to can “real space” effect the warp.

A good way to think of our reality is as a glass of ice water. Water molecules in the surrounding air will begin to condense on the cold surface of the glass eventually forming visual condensation. Similarly energy from the surrounding warp is attracted to “real space” and may begin to take on some of its characteristics. The interaction is not a uniform process. It may be that the interaction of the warp and our reality is what causes the warp currents. If the energy of the warp is able to pick up patterns of real space, then it is possible that time might also come to exist in the warp. It may also be in those areas that show the most violent interaction between our reality and the warp, warp storms. The ship itself would for the most part be protected by the geller field from these changes in reality, but they may become trapped in an area where time flows differently.

It's not just sci-fi. Superstring theory uses at least 10 dimensions, and this is a real theory about the real world, not pure math and not science-fiction. The higher dimensions are curled up inside every point within 3D space.

Superstring theory is real, though whether it is right is another more difficult question.