Pugdaddy

I was thinking that the whole reason teleportation would be desirable is to go from one place to another instantly. It doesn't really matter if you go through space or not. I know the Alcubuerra metric was thought of as a way to shorten intersteller travel times. I was wondering if that the Alcubuerra Metric describing the expansion of spacetime in front and contraction of spacetime behind could be adapted for short distances. If we could do that, would that not be better than teleportation? In theory you could travel to anyplace on earth instantly.

I though that vacuum space had a non-zero energy density. So the"pile" would surrounded by a sea of virtual particles popping in and out of existence with some density probability distribution. Due to the uncertainty principle, at the edges of the "pile" would some of the virtual particles would pop into existence within the "pile".

I am reading a book about Einstein right now written by Walter Isaacson. I am about to 1912. Einstein was a bit of a rebel. He was not considered a very competent teacher. Lorentz and Einstein were friends and often communicated by letters. In July 1912 Einstein moved back to Zurich from Prague. He contacted his college buddy Marcel Grossman, a brilliant mathematician who did his dissertation on non-euclidean geometry, published 7 papers on it and was chairman of the Math department. Einstein was not the greatest mathematician and never took it too seriously or studied it to any great extent, but now he was starting to acquire an appreciation that Mathematics could be a tool for discovery and not just a description. Before he had much preferred his intuition guide him to the physical principles and leave the math to others like his Zurich colleague Minkowski did in Special Relativity. That is where Grossmann came in. Grossmann recommended a paper Bernhard Riemann did for his thesis on curved surface in multi dimensions. Riemann thesis adviser was Carl Gauss who was a pioneer in the field in the mid 19th century. Einstein wanted to develop math that described two complementary processes. How a gravitation field told matter how to move and how matter told the gravitational field how to curve space. This led him to another insight of genius that gravity could be defined as the curvature of space time. He spent the next three year working on this with Grossmann. When he was working as a patent clerk, there was an flood of patents submitted to synchronize clocks as the rail system was expanding but there many cities connected by a single rail causing nightmare collisions. a Standard time was needed. This is where the seed was planted that motion was through time and space. Things in the same inertial reference frame had all their motion through time. When someone moves relative to another, some of their motion is now through space. This he realized meant that for each observer, time passed at different rates. I know WOW. Some time insight is more collective notion that an individual one. This I find fascinating. For example the alchemists thought the world was made up 4 things. Earth, air water and fire. The fact that is no where near the truth is not the point though. This was a significant leap in that it introduced the concept that the world could be described in terms of a combination of fundamental things. Since them we have learned much about fundamental things, but it is still the same concept.

It is also resolution. If we think of the electron as a wave propagating through space at a specific wavelength. If we measure it's position by bouncing a photon, also propagating through space, at a specific wavelength off it, the wavelength of the photon must be smaller than the wavelength of the electron or we will get a fuzzy picture. The smaller the wavelength of the photon the better the resolution and the better we know the position. Problem is that the smaller the wavelength of the photon the higher the frequency of the photon and the higher the energy it carries. So the finer we resolve the position the more the photon changes the momentum of the electron when it bounces off it. That means better we know position the less we know the momentum.

No that is not what I mean. If the electron passes detector A (x,y,z)=0, then 1 second later passes detector B (x=10,y=0,z=0). That gives you the average speed (10 m/s) of the electron between point A and point B, but does not tell you how fast the electron was moving when it passed point A.

What you want to know is the instantaneous speed as you reduce the distance between point B and point A. If you make a measurement at two points in space you always get average speed between them. What we can't do in reality is reduce the distance between measurement to 0 and still get some meaningful answer. Maybe a better way to put it is the definition of "speed" is distance over time. As you move your measured points closer and closer, both distance and time go to 0. that leaves 0 distance divided by 0 time.

I also cannot find much on the Net that describes the "Chung-Freese Metric". Except in Dr Whites paper. Even Wikipedia has no entries. ajb you are on the right track as I did find this. "A parallel with the Chung-Freese spacetime metric is drawn to demonstrate that the spacetime expansion boost can be considered a 3 + 1 on-brane simplification for higher dimensional geometric effects"

Sorry about being vague. I am new to the forum and not an expert. Just trying to understand things. I was reading the "Warp Field Mechanic 101" paper by Dr. Harold “Sonny” White. http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20110015936_2011016932.pdf It said "The driving phenomenon that facilitates speedy travel to stellar neighbors is proposed to be the expansion and contraction of space (York Time)" This may be beyond my level of understanding. I was hoping someone might be able to dumb it down for me. Thanks, I really appreciate the help.

Can anyone tell me what "York Time " is?

Jean-Pierre Luminet and his colleagues in France say the Universe is shaped like a dodecahedron. Also the expansion of space in not limited by the speed of light(eg Inflation).

Since the Alcubierra drive has been around for a while. I imagine the math has been checked and rechecked and is valid. What are the main problems with the theory? I see that Sonny White has addressed some of the energy problems. I also see that his research team is trying to make a tiny "warp bubble" by perpetuating space with lasers. I was wondering if that maybe this could be adapted to say move a package from one part of the world to another instantaneously? I bet Fed ex would love this.