Thoughts about "At last, a way to test time travel" from issue 2552 of New Scientist magazine, 22 May 2006, page 34.
I think that the concept of time travel, or time relocation as I would like to phrase it, seems more viable then ever. I agree that it seems possible that physics theoretically seems to allow time relocation. But I believe th ere is a major important issue lacking discussion concerning the subject that need hi-lightning. To be able to prove the theory by experiment, we would have to relocate particles in the fourth dimension and measure them elsewhere. The big issue, no one seems to address, is that a experiment requires a incredibly stable testing environment in all other dimensions. Based on the theories that space time itself seems to be expanding and that our galaxy is speeding away from the location of the big bang, the place of measurement is extremely hard to calculate as we do not really know our movement vector in the other dimensions. A time traveler would very likely be sent to a empty place in space.
Some interesting ideas does however arise. Could extremely well measured particle relocation enlighten us on our present 3d vector in space? Could extremely well coordinated time traveling allow us to relocate ourselves in the 3d dimensions, without using any kinetic energy whatsoever?(only from or against our current travelling vector) Mind boggling indeed.
I think that the concept of time travel, or time relocation as I would like to phrase it, seems more viable then ever. I agree that it seems possible that physics theoretically seems to allow time relocation. But I believe th ere is a major important issue lacking discussion concerning the subject that need hi-lightning. To be able to prove the theory by experiment, we would have to relocate particles in the fourth dimension and measure them elsewhere. The big issue, no one seems to address, is that a experiment requires a incredibly stable testing environment in all other dimensions. Based on the theories that space time itself seems to be expanding and that our galaxy is speeding away from the location of the big bang, the place of measurement is extremely hard to calculate as we do not really know our movement vector in the other dimensions. A time traveler would very likely be sent to a empty place in space.
Some interesting ideas does however arise. Could extremely well measured particle relocation enlighten us on our present 3d vector in space? Could extremely well coordinated time traveling allow us to relocate ourselves in the 3d dimensions, without using any kinetic energy whatsoever?(only from or against our current travelling vector) Mind boggling indeed.
1 kommentar:
Got a response from Heinrich who wrote the article...
*****SNIP*****
You are raising a very important question, and I discussed this issue a
lot with my collaborator Tom Weiler: If we send neutrinos into an extra
dimension, will they ever come back into our 3-dimensional brane
universe, and if so, how do we know where they will enter. Without doing
the calculation, I think one should stress here that particles like
neutrinos have to be treated quantum-mechanically, that means they will be
described by a wave-function, which propagates into every direction
possible. So if we send them out at point A some of them will always
arrive at point B. Now, according to the principle of least action, the
most probable "path" for neutrinos will be the fastest, i.e. the path taking a
shortcut in extra dimensions. Thus I think it is well-motivated to assume
that some significant portion of our neutrino signal will travel through
the extra dimension from point A to point B. I can't make a quantitative
statement how big this portion is - for that one should perform a quantum
field theory calculation, but at least in principle there is some reason
to be optimistic.
Btw, it is not correct that galaxies are speeding away from the location
of the big bang. The big bang didn't have any specific location, it
happened everywhere. Rather, space itself is stretched between the
galaxies, so that any point in the universe speeds away from any
other. Just a little correction. Besides that, nice blog, I hope you go on
like that.
Greetings to Visby - Heinrich
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Heinrich Paes
Department of Physics & Astronomy
University of Hawaii at Manoa
*****SNAP*****
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