Gravitons from LQG
Graviton propagator in loop quantum gravity
Authors: Eugenio Bianchi, Leonardo Modesto, Carlo Rovelli, Simone Speziale
They claim to compute some components of the graviton propagator from LQG. If the calculation is solid then this makes a big step towards the main problem haunting LQG, the mysterious low energy limit of the theory. I haven't read yet most of the paper, but the list of open issues in the conclusions is huge, so there is still a lot of work to be done.
I make the following predictions: a) Christine will link to the paper in the following hours; b) Lubos will do the same, perhaps a bit later, with a long explanation on how this paper and the whole of LQG are wrong, unphysical, pseudo-scientific, and perhaps even liberal and pro-global warming; c) perhaps Peter will link to it also, even later, gleefully commenting that LQG is doing more progress than string theory and that Lubos is becoming crazy becasue of that.