(February 9, 2015 at 3:22 pm)Alex K Wrote: I have a big problem with this. If there is anything like inflation occurring (and we know that *something* like it has to come in because of the horizon and flatness problems), the usual classical singularity is not present anyways. We know that the flrw equations with just radiation, matter and cosmological constant can't be valid all the way back to near their singularity because of the flatness and horizon problems for which inflation was invented in the first place. I find it worrisome that the linked paper does not address these issues at all.
So I don't see whether the work mentioned here is applicable to the real world. We already knew that the naive "beginning" which one gets from a straight use of the friedman equations, is not there. WLC was using deprecated physics from 50 years ago in the first place.
There is the Borde Guth Vilenkin theorem, but it does *not* say that there is a beginning before inflation. It says that necessarily something beyond classical field theory is needed to describe what comes before.
http://www.theaunicornist.com/2012/10/ho...sents.html
The hypothesis is still in its infancy. The physics community (which you are a part of) will give them hell until the model is invalidated or the community runs out of big stones to throw at them.