Unified Theory of Dark Matter, Dark Energy from altered EFE

Lord_Sidious
Messages
17
Reaction score
0
www.sciencedaily.com/releases/2012/09/120906092059.htm

http://arxiv.org/abs/1206.5078

Very interesting article, has anyone seen this or looked at the paper? I don't have GR knowledge to make sense of what's going on.

"The difference between the new field equations and Einstein's equations is the addition of a second-order covariant derivative of a scalar potential field"
 
Physics news on Phys.org
Since we already have a thread about this, i have closed this thread. Anny comments should be placed in the thread to which Ben linked.
 
I asked a question here, probably over 15 years ago on entanglement and I appreciated the thoughtful answers I received back then. The intervening years haven't made me any more knowledgeable in physics, so forgive my naïveté ! If a have a piece of paper in an area of high gravity, lets say near a black hole, and I draw a triangle on this paper and 'measure' the angles of the triangle, will they add to 180 degrees? How about if I'm looking at this paper outside of the (reasonable)...
From $$0 = \delta(g^{\alpha\mu}g_{\mu\nu}) = g^{\alpha\mu} \delta g_{\mu\nu} + g_{\mu\nu} \delta g^{\alpha\mu}$$ we have $$g^{\alpha\mu} \delta g_{\mu\nu} = -g_{\mu\nu} \delta g^{\alpha\mu} \,\, . $$ Multiply both sides by ##g_{\alpha\beta}## to get $$\delta g_{\beta\nu} = -g_{\alpha\beta} g_{\mu\nu} \delta g^{\alpha\mu} \qquad(*)$$ (This is Dirac's eq. (26.9) in "GTR".) On the other hand, the variation ##\delta g^{\alpha\mu} = \bar{g}^{\alpha\mu} - g^{\alpha\mu}## should be a tensor...
Back
Top