Faster than light universe?
-
Jörgen Sigvardsson wrote:
Just because light can't travel faster than a certain speed, doesn't mean that space itself can expand faster.
Sometimes it's the simple explanations that are the best.
Jeremy Falcon
I hope you saw that I missed a "can't" (was can). :)
-- This episode performed entirely by sock puppets
-
I hope you saw that I missed a "can't" (was can). :)
-- This episode performed entirely by sock puppets
Jörgen Sigvardsson wrote:
I hope you saw that I missed a "can't" (was can).
I didn't notice that at all. :-O But, I still got what you were saying at least.
Jeremy Falcon
-
Exactly :) Relativity says that information cannot travel than the speed of light, it says nothing about objects travelling faster than the speed of light (as far as I can remember from my college days). If there are any object that travel faster than the speed of light, we have no way of sensing that they are actually doing so. So it is perfectly plausible to think of a universe that is wider than ~31 light years. Nicola
-
Chris Maunder wrote:
11 and 26 dimension versions are really unstable and back backwards compatibility problems, though.
which is why superstring theory has moved onto compactification of dimensions to 10. Bosonic hyperspace of 26 dimensions suffers the problems of tachyon particles with imaginary mass. More current discussions involve supersymetry, dimensional compactification, and M-theory variants. :cool:
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
Jeffry J. Brickley wrote:
Bosonic hyperspace of 26 dimensions suffers the problems of tachyon particles with imaginary mass.
but what about the warp drives ?
-
But how would we know? :confused:
š Cheers, Vikram.
I don't know and you don't either. Militant Agnostic
I don't think there is anyway currently to measure the existence of gravitons, nevermind trying to determine if they cross universal boundaries. I have no clue how they plan to figure it out either. The idea behind them, I think, is that they are can be closed strings which can leave the "surface" of the universe, called a brane, and travel to other branes. Open strings attach themselves to the brane thereby remaining within a single universe. I might have that wrong, it's all very new to me and a bit fantastic really.
BW
If you're not part of the solution, you're part of the precipitate.
-- Steven Wright -
Isn't there a theory that gravitrons or something can jump between universes?
BW
If you're not part of the solution, you're part of the precipitate.
-- Steven WrightI'm not sure if it's what you're thinking of, but acording to superstring/m-theories, unlike the other force cariers gravitons should able able to spread energy across the other 6 rolled up dimensions. This leaking would help explain why gravity is so many orders of magnitude weaker than any of the other three forces. THe interesting part is that this is the one prediction that the theories make that could actually be testable. We've only been able to measure gravity down to a resolution of ~1mm, which means the hidden dimensions could be upto that large. If they are, particles in the LHC and high energy cosmic rays would be energetic enough to create ultra low quantum black holes when they collide, thier immediate decay would produce identifyable particle showers that would be detectable by instruments.
-
Because when you counted your gravitrons the next morning, you'd be missing a few. :-D
Author of The Career Programmer and Unite the Tribes www.PracticalStrategyConsulting.com
Heheh. You don't want to run around short a few gravitons, that's for sure. People look at you funny.
BW
If you're not part of the solution, you're part of the precipitate.
-- Steven Wright -
Exactly :) Relativity says that information cannot travel than the speed of light, it says nothing about objects travelling faster than the speed of light (as far as I can remember from my college days). If there are any object that travel faster than the speed of light, we have no way of sensing that they are actually doing so. So it is perfectly plausible to think of a universe that is wider than ~31 light years. Nicola
DragoNick wrote:
Relativity says that information cannot travel than the speed of light, it says nothing about objects travelling faster than the speed of light (as far as I can remember from my college days). If there are any object that travel faster than the speed of light, we have no way of sensing that they are actually doing so.
And thus was born the concept of a tachyon which has led to much great science fiction! Marc
Some people believe what the bible says. Literally. At least [with Wikipedia] you have the chance to correct the wiki -- Jörgen Sigvardsson
People are just notoriously impossible. --DavidCrow
There's NO excuse for not commenting your code. -- John Simmons / outlaw programmer -
Jeremy Falcon wrote:
At least it compiled.
It must be right then... I hear that all the time, no syntax error, it must be right... :laugh:
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
Jeffry J. Brickley wrote:
I hear that all the time, no syntax error, it must be right...
GPF, what GPF? I don't see no steekin' GPF!
Jeremy Falcon
-
Jeffry J. Brickley wrote:
I hear that all the time, no syntax error, it must be right...
GPF, what GPF? I don't see no steekin' GPF!
Jeremy Falcon
Jeremy Falcon wrote:
GPF, what GPF? I don't see no steekin' GPF!
"Murphy's law" is really just ignored memory leaks.
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
-
Jeffry J. Brickley wrote:
Bosonic hyperspace of 26 dimensions suffers the problems of tachyon particles with imaginary mass.
but what about the warp drives ?
Chris Losinger wrote:
but what about the warp drives ?
Why do you think there is no warp 26?
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
-
I don't think there is anyway currently to measure the existence of gravitons, nevermind trying to determine if they cross universal boundaries. I have no clue how they plan to figure it out either. The idea behind them, I think, is that they are can be closed strings which can leave the "surface" of the universe, called a brane, and travel to other branes. Open strings attach themselves to the brane thereby remaining within a single universe. I might have that wrong, it's all very new to me and a bit fantastic really.
BW
If you're not part of the solution, you're part of the precipitate.
-- Steven Wrightbrianwelsch wrote:
I don't think there is anyway currently to measure the existence of gravitons, nevermind trying to determine if they cross universal boundaries. I have no clue how they plan to figure it out either.
We're a looooong way from detecting a single graviton, we've yet to detect even the strongest gravity waves that should be passing through our planet. LIGO has proved thier nonpresence down to a contraction/expansion of 10^-20, the current science run is going at the design level of 10^-22, which is the equilant of changing the sun-saturn distance by the diameter of a hydrogen atom. A run carried out at an intermediate sensitivity is undergoing final analysis now (The brute force crunching part was completed about a month ago).
-
Jeffry J. Brickley wrote:
Bosonic hyperspace of 26 dimensions suffers the problems of tachyon particles with imaginary mass.
but what about the warp drives ?
-
I always preferred the gravity drive from http://en.wikipedia.org/wiki/Giants_series[^].
_________________________ Asu no koto o ieba, tenjo de nezumi ga warau. Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
-
Christopher Duncan wrote:
Because if the radius of the universe is 90 billion light years but the universe is less than 20 billion years old, then you have to play some games with the term "year" to make the math work.
Ah, lessoned learned. I shouldn't talk astrophysics while my girlfriend is calling me to go get my food at the same time. :-D
Jeremy Falcon
Doesn't the fact that you have a girlfriend pretty much disqualify you from being a physicist in the first place? :-D
Author of The Career Programmer and Unite the Tribes www.PracticalStrategyConsulting.com
-
There is no beyond. or Cheese curds and beer.
---- Scripts i’ve known... CPhog 1.8.2 - make CP better. Forum Bookmark 0.2.5 - bookmark forum posts on Pensieve Print forum 0.1.2 - printer-friendly forums Expand all 1.0 - Expand all messages In-place Delete 1.0 - AJAX-style post delete Syntax 0.1 - Syntax highlighting for code blocks in the forums
We are a big screwed up dysfunctional psychotic happy family - some more screwed up, others more happy, but everybody's psychotic joint venture definition of CP
Tree in C# || Fold With Us! || sighist -
Isn't there a theory that gravitrons or something can jump between universes?
BW
If you're not part of the solution, you're part of the precipitate.
-- Steven WrightFrom what I've read that sounds like some of the brane theories. We live on a 4 dimensional brane in a higher dimensional universe. Most particles we encounter are constrained to the brane and gravity works in the entire multidemnsional space. This is one way to explain why gravity is so weak and we have particles with the masses and interactions that we observe.
Using the GridView is like trying to explain to someone else how to move a third person's hands in order to tie your shoelaces for you. -Chris Maunder
-
There is no beyond. or Cheese curds and beer.
---- Scripts i’ve known... CPhog 1.8.2 - make CP better. Forum Bookmark 0.2.5 - bookmark forum posts on Pensieve Print forum 0.1.2 - printer-friendly forums Expand all 1.0 - Expand all messages In-place Delete 1.0 - AJAX-style post delete Syntax 0.1 - Syntax highlighting for code blocks in the forums
Shog9 wrote:
Cheese curds
<homer drool>ahhhhhhhhhhhhhhhhhhhh</homer drool> Can you get them where you are? I've only seen them in Cheeseland growing up they were one of my favorite childhood treats.
Using the GridView is like trying to explain to someone else how to move a third person's hands in order to tie your shoelaces for you. -Chris Maunder
-
We are a big screwed up dysfunctional psychotic happy family - some more screwed up, others more happy, but everybody's psychotic joint venture definition of CP
Tree in C# || Fold With Us! || sighist;) I was kinda hoping someone else would join in.
---- Scripts i’ve known... CPhog 1.8.2 - make CP better. Forum Bookmark 0.2.5 - bookmark forum posts on Pensieve Print forum 0.1.2 - printer-friendly forums Expand all 1.0 - Expand all messages In-place Delete 1.0 - AJAX-style post delete Syntax 0.1 - Syntax highlighting for code blocks in the forums
-
It all shows that you need to plan and document, plan and document before you start thinking you can just slap together 26 dimensions and assume it'll all work. Imaginary mass for tachyon particles? Can you say "kludge"? :rolleyes:
cheers, Chris Maunder
CodeProject.com : C++ MVP
Actually from what I've read, they've found a solution to that problem. I can't remember the details, but I think it involved dual strings. Esentially they were using a bad perterbation. Some of the latest non-string theories can shoehorn all the particles into a 4 dimensional subspace of a 5 dimensional space with exponentially increasing gravity in the 5th dimension. It sounds completely artificial but it does produce a solution with the big gap between the weak and strong scales.
Using the GridView is like trying to explain to someone else how to move a third person's hands in order to tie your shoelaces for you. -Chris Maunder