I am wondering what everyone here thinks about some of the work that has gone into researching quantum mechanics without spacetime. I am only a third year physics student at college (having done classical mechanics, electromagnetism and quantum mechanics upto perturbation theory, special relativity...so it is probably way over what I know) but it does seem an interesting avenue.

I only began thinking of this when my friend and I, began talking about the Big Bang and how popular documentaries say that the concept of space-time breaks down? I guess space and time, when applied to quantum theory, can be strangely different to what we think of in a classical world like entanglement or even the uncertainty principle. Is the concept of quantum mechanics without spacetime similar to loop quantum gravity? I tried googling some info but I quickly ran into papers that I could barely understand like the one below.

http://arxiv.org/abs/gr-qc/0406054