Short question: What published works and what research groups are investigating the possibility of inexistance of gravity at quantum level?
Long question: I am no phisicist, but of what I read and understand of the subject, no one has been able to fit graviton into the standard model, it seems that the equations won't renormalize, thus it would be useless for predictions. Gravity also is undetectable at quantum level, it seems because the force is too small. Also, about every book about the subject traces a strong distinction between "quantum level" and "classical level", almost if they were different worlds that obeys different laws of nature, and how they relate to each x other is an open question. Finally, at least two sources I have seen states that Einstein's General Relativity is the most well veryfied thoery of all physics, because of something related to pulsars.
Thus there are two distinct "worlds": in one gravity is pretty much settled, while in the other, it is neither detectable nor mathematically explainable in the most succesful model. From that, the most logical and simple explanation I can have is that simply there are no such thing as quantum gravity, and that it is a purely classical phoenomenon that arises from whatever may be the relation of the both "worlds".
I like to imagine that space coordinates of both worlds are quite not the same, although very similar locally, thus, if classical world emerges from a projection of the quantum world, like a shadow, gravity are bumps in the surface where that shadow is projected (holographic principle comes in my mind now).
It does't seems to be the mainstream view of the problem, with millions of dollars spent in trying to find the mythical graviton (that is what a physicist of INPE, Brazilian's spacial research institute, told me yesterday). Thus, I whant to know, what are the works, and what people shares with me this view of the problem?