Wormholes

[1123581321]

hi,

I was wondering, if the vacuum of space (theoretically) consists of virtual particles. When in the picture of traveling through a wormhole by means of connecting 2 points or locations of space and bending them into one thereby allowing the instantaneous travel of a vast distance. In the concept of actually bending space-time. Since the space itself is perhaps made up of virtual particles, as i mentioned. Does/wouldn't this mean, in order to (physically) bend space, it would require some sort of manipulation of the virtual particles themselves, or for generalized sake, whatever makes up the apparent nothingness of space ?

[toastywombel]

hi,

I was wondering, if the vacuum of space (theoretically) consists of virtual particles. When in the picture of traveling through a wormhole by means of connecting 2 points or locations of space and bending them into one thereby allowing the instantaneous travel of a vast distance. In the concept of actually bending space-time. Since the space itself is perhaps made up of virtual particles, as i mentioned. Does/wouldn't this mean, in order to (physically) bend space, it would require some sort of manipulation of the virtual particles themselves, or for generalized sake, whatever makes up the apparent nothingness of space ?

 

Well, space in this sense, would be better if it is unified with time, spacetime.

 

http://en.wikipedia.org/wiki/Spacetime.

 

For matter or energy to travel any given distance lets say point A to point B

 

(A-B)

 

must take up as much time equal to or less than the time it takes light © to travel that same distance, if of course, the matter or energy is moving through spacetime.

 

(A-B)/t </= (A-B)/c

 

If, by chance something were able to travel faster than light from point A to point B, that object/energy would be going back in time, relative from an observer at starting point A. And, that object would be coming from the future, relative to an observer at point B.

 

But, if you imagine space time as a two dimensional, flat sheet, you can fold the sheet over itself in the higher dimension, or as we know it, the third dimension. This brings the two ends of the sheet, which were previously far apart, together instantly.

 

The ability to do this with spacetime (fold it through the dimensions above, 4th, 5th, or 6th) would make it possible for one not only to transport vast distances instantly, but it would also cause he/she to go back in time (relative from point A).

 

The problem that comes about from the above and what you described, is it really possible to go back in time? If so, what are the repercussions? What would it take to do this?

 

Let us consider if one were to transfer from Earth, to a point twenty light years away (lets say point z) instantly. Once he/she arrived at point z, it would take twenty years for a radio signal sent by him/her, to arrive to Earth, from the perspective of an observer at point z.

 

However, from the perspective of an observer on Earth, her signal would arrive right after he/she left to point z.

 

How would it be possible to effectively communicate with the limitations given above?

 

Furthermore, how would it be possible to navigate such movements? It would be much like diving into a black pool. It is impossible to see what is in front of you, because you are travelling faster than light can transfer data from where you are traveling to.

 

As far as what it would take to bend space time, well according to m-theory, it is very likely it would take more than our ability to manipulate virtual particles.

 

http://en.wikipedia.org/wiki/M-theory

 

See, according to m-theory, which is a form of string theory. Subatomic Particles can be viewed as strings. These strings are either open or closed.

 

Open strings are what make up the world we can observe. These open strings can interact with each other, because energy can transfer along the open strings and out the endpoints, to other open strings.

 

Of course there are spacial restrictions to how close the endpoints of different open strings have to be within ,each other, in order for them to interact. Because there are these spacial restrictions present, we can state that these open strings exist within a p-brane.

 

(A p-brane is one type of brane, but all types of branes represent the dimensional and spacial restrictions of interaction between endpoints of given open strings)

 

If an open string (A) is outside of the p-brane of open string (B). It is impossible for open string (A) to interact with open string (B). For open string to interact they must share the same p-brane.

 

Shortly after Witten's breakthrough in 1995, Joseph Polchinski of the University of California, Santa Barbara discovered a fairly obscure feature of string theory. He found that in certain situations the endpoints of strings (strings with "loose ends") would not be able to move with complete freedom as they were attached, or stuck within certain regions of space. Polchinski then reasoned that if the endpoints of open strings are restricted to move within some p-dimensional region of space, then that region of space must be occupied by a p-brane. These type of "sticky" branes are called Dirichlet-P-branes, or D-p-branes. His calculations showed that the newly discovered D-P-branes had exactly the right properties to be the objects that exert a tight grip on the open string endpoints, thus holding down these strings within the p-dimensional region of space they fill.

 

http://en.wikipedia.org/wiki/M-theory#Strings_with_.22loose_ends.22

 

So what does this all mean. You and me are made up of open strings, the world directly around us is made up of open strings. Therefore we are confined not only to our dimension, but to the p-brane we exist in.

 

So to fold space-time would require the ability to manipulate/interact with particles outside our dimension, and outside our local brane. This would violate the above concept.

 

Not all strings are confined to p-branes. Strings with closed loops, like the graviton, are completely free to move from membrane to membrane. Of the four force carrier particles, the graviton is unique in this way. Researchers speculate that this is the reason why investigation through the weak force, the strong force, and the electromagnetic force have not hinted at the possibility of extra dimensions. These force carrier particles are strings with endpoints that confine them to their p-branes. Further testing is needed in order to show that extra spatial dimensions indeed exist through experimentation with gravity.

 

The above is from wikipedia as well. It says, that the only shared basic force between the dimensions is gravity (because the graviton is a closed string and can travel through multiple p-branes). This means that folding spacetime, which could only be done through a higher dimension, would require us to understand the laws of physics, governing a part of our universe, that it is physically impossible to interact with.

 

The in-ability for us to interact/observe strings outside of our local dimension would make it very hard or impossible for scientists/ engineers to develop technology that would allow them to manipulate these strings in such a way that would allow for the bending of space time.

 

Possible? Maybe, but even if so, it is a long shot, and would require much more than the manipulation of virtual particles in our dimension. Here are some more related links you might want to check out. Hope this helped.

 

http://en.wikipedia.org/wiki/Virtual_particle

http://en.wikipedia.org/wiki/String_theory

http://en.wikipedia.org/wiki/Superstring_theory

http://en.wikipedia.org/wiki/M-theory

http://en.wikipedia.org/wiki/Introduction_to_M-theory (less technical explanation)

http://en.wikipedia.org/wiki/P-brane

Edited April 18, 2010 by toastywombel

[sr.vinay]

I've a question:

Consider that we somehow do travel through wormholes. If we're bending the time co-ordinate, shouldn't our body be put under series of changes in the bent co-ordinate?

As in, we're going to be put under the changes we might have undergone in getting to the place in the universe without the wormhole.

[Realitycheck]

please disregard this post

Edited April 30, 2010 by agentchange