Dark energy from gravity waves?

[skydivephil]

A new paper appeared on the arxiv today suggesting this possibility:
http://uk.arxiv.org/abs/1305.0498
I would not have paid too much attention apart from the fact that when this was suggested a while back it was said it might explain some of the WMAp anomalies:

http://www.technologyreview.com/view/425513/gravitational-waves-can-explain-dark-energy-and-axis-of-evil-says-cosmologist/

I think at the time most people didnt think these anomalies would surivie the higher reolsution of Planck, but now they have is it worth revisitng this idea?
What would it mean for the equation of state, shoudl we expect w to change over time as blakc holes evaporate in the far future?

 

[Mordred]

Interesting article I'm not sure how much weight to place on it but it will be an interesting read. The one question I would ask is how can gravitational waves be used to explain the Homogenous and isotropic expansion? I would think it would lead to a more inhomogeneous expansion

 

[skydivephil]

My guess would be black holes are distributed in a homogenous and isotropic manner as galaxies are.

 

[Mordred]

After reading the article I could not determine how they cover a homogeneous and isotropic distribution. Even if super massive BH's are evenly distributed, the waves from each BH would interact with each other. That alone would lead to an uneven distribution of "dark energy". The 4-d Branes and 5-d branes also don't particularly explain that. Not that I particularly understand Brane models.

 

[sardar]

I find this new paper and its suggestion of dark energy from gravity waves to be intriguing and worth considering. The idea that gravitational waves could explain some of the anomalies seen in the WMAP data is certainly worth revisiting, especially now that the Planck data has confirmed these anomalies.

If this hypothesis is true, it would have significant implications for our understanding of dark energy and the equation of state. The equation of state, which describes the relationship between the pressure and energy density of a substance, is a crucial factor in understanding the behavior of dark energy. If dark energy is indeed caused by gravity waves, we would expect the equation of state to change over time as black holes evaporate in the far future. This would have important consequences for our understanding of the expansion of the universe and the fate of the universe.

However, it is important to note that this is just a hypothesis at this point and more research and evidence is needed to confirm or refute it. As scientists, it is our duty to continuously revisit and reevaluate ideas and theories as new evidence and data becomes available. I believe that this new paper and the possibility of dark energy from gravity waves is worth further investigation and could potentially lead to a better understanding of the mysterious force driving the expansion of our universe.