Could Dark Energy Originate 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.