Science
Related: About this forumDarth Vader, Math heads upset Einstein's field theory.
New calculations relating to dark matter brought by a Chinese mathematician and a UI mathematician adjust science's Big Old Relativity Equation.
But what will physicists say about all this?
http://www.sciencedaily.com/releases/2012/09/120906092059.htm
From the article:
Wang said negative energy produces attraction while the positive energy produces a repelling force fundamentally different from the four forces -- gravity, electromagnetism, the weak interaction and the strong interaction -- recognized in physics today.
"Most importantly, this new energy and the new field equations offer a unified theory for both dark energy and dark matter, which until now have been considered as two totally different beasts sharing only 'dark' in name," he said. "Both dark matter and dark energy can now be represented by the sum of the new scalar potential energy density and the coupling energy between the energy-momentum tensor and the scalar potential field."
The negative part of this sum represents the dark matter, which produces attraction, and the positive part represents the dark energy, which drives the acceleration of expanding galaxies, he said.
"In a nutshell, we believe that new gravity theory will change our view on energy, gravitational interactions, and the structure and formation of our universe," Wang said.
longship
(40,416 posts)If experiment can validate this, these two are going to be making a trip to Stockholm some day. Finding a modification to Einstein's general relativity is a big fucking deal if it holds up.
Too bad it isn't yet a quantum theory. But physics will take this. Maybe it's a path to solve that particular problem -- grand unification.
R&K
central scrutinizer
(11,648 posts)[link:|
longship
(40,416 posts)I was becoming a bit worried that we'd never solve it.
"For the SPLAYD theory of cutlery, we award the Nobel Prize in physics and henceforth retire the award. People of the world will forevermore be able to eat in peace and comfort."
China and Japan have protested as they have an independent theory with a more complicated Venn diagram including the stick theory of cutlery.
The Nobel Comittee has up to now been silent. Insiders close to the Comittee indicate there was embarrassment with the speculation that a reversal and appropriate apology for cultural insensitivity may soon be forthcoming.
Confusious
(8,317 posts)It's bigger then you think.
Negative energy is needed to hold wormholes open.
We just need a little dark matter to go zipping around the universe.
caraher
(6,278 posts)It's been on the arXiv since June and doesn't seem to have made much of a splash, nor has it undergone any kind of peer review so far as I can tell. The press release doesn't indicate that it's even been submitted for publication.
Intriguing, but way too early to call it significant. And this is too far outside my expertise to assess on its merits.
The Doctor.
(17,266 posts)The energy-momentum tensor concurs with the Hubble constant and scales geometrically with mass. It is mass/acceleration-differential that determines the 'attraction'.
'Dark matter' is as incidental as 'passing trees' are while viewed from a moving train.
truedelphi
(32,324 posts)Actually I can say - I am rather an idiot when It Comes to physics.
But you sound like you know a thing or two.
Here's my query - how does dark matter relate to electro magnetism?
(If it does?)
The Doctor.
(17,266 posts)Really, I don't think they interact any more directly than the the same interactions with gravity itself.
I just have this theory that we've been looking at gravity ALL wrong for a very long time. It's understandable considering that the observable effects can be interpreted as gravitational 'pull', but I look at gravity as an absolutely relativistic, ever greater acceleration of the universe in spacetime. If we start to think of all things, including space, 'growing' ever faster, all at once, and with mass being a multiplying factor on that acceleration, we can see that gravity is really everything pushing against or toward each-other.
The space between everything 'grows'. Everything massive 'grows' at a rate dependent on mass. Everything would appear to be stationary but with what seemed to be an attracting force acting on proximal objects.
This would solve the dark matter/energy question.
It would also explain why you need more space from a massive object to avoid winding up in its omni-directional path of acceleration. It also fits with the theory described in the OP.
Basically, it fits everything but remote gravimetric lensing. But just because I haven't figured out how to reconcile that yet, doesn't mean it can't be reconciled.
As for electro-magnetism and dark matter, I just haven't put enough study or thought in to have anything I would consider a valid idea except for what I stated above. Which is to say: I'm really not sure.
truedelphi
(32,324 posts)I will carefully consider them. I should be meeting up with an old friend - a very knowledgeable physics person sometime in the next six months. Will be asking questions and presenting speculation from him on all this. Probably will be starting a separate topic here in science forum after that meeting.