Curiosity episode with Stephen Hawking. The Big-Bang

In an episode of Discovery's Curiosity with host Stephen Hawking, he claims the Big Bang event can be explained from physics alone, and does not require the intervention of a creator.

1) His argument is based on that, in the beginning, the universe is an equivalent of a black hole behaving as a quantum mechanical particle that can simply "appear" like a Helium particle in alpha radiation. For a large gravitational field like the black hole in question, time did not exist, and therefore there could not exist a being to create the Big-Bang, since time did not exist.

2) During the Big-Bang, positive energy appeared and negative energy was stored in space, and the net energy created is zero and therefore nothing was created.

I am curious on the foundations of Hawking´s claims in the episode.

Is the Big-Bang black hole really modeled as a quantum mechanical particle? Was there really a black-hole at all? What is the resulting entropy change of this black-hole during an event such as the Big-Bang? Are his claims of negative energy stored in space sound or well accepted?

• I would actually like to avoid these discussions, and I wanted to talk more about the physics. – l3win Dec 31 '12 at 11:30
• This question I think covers most of what you are asking. This one might cover the energy bit. Basically this seems to be one of Dr. Hawking's pet theories, and is speculative at this point. – Retarded Potential Jan 2 '13 at 22:38
• Oy vey. The truth is we really have no idea why the universe exists, whether or not it is eternal or began a finite time ago, or whether it is part of a larger multiverse of some kind. There are many theories of course, but one should be careful to distinguish between the (un)fashionable theories of the day and what is experimentally established. Shows like that often blur the boundaries a little (or a lot!) for ratings purposes. The big bang happened, but we don't know how or why or what, if anything, came before it. – Michael Jul 1 '13 at 4:03

It's rather just a vacuous (and useless, since it defeats the point of defining energy) definition of $-G_{\mu\nu}/8\pi$ as a sort of "negative gravitational energy" which cancels out $G_{\mu\nu}$. This is pointless, and is not the right answer to the question "How did the big bang create stuff?".