In my opinion though, there are multiple problems with all "infinite" oscillation views, although the one you point to does seem slightly different, but in many ways still the same. For example, they generally face problems from entropy which decreases over time within the universe. One has to entirely do away with the second law in order to posit that there wouldn't be less and less energy with every bounce (whether the bounce is the universe itself after a contraction, or multiple other universes spawned by a universe onces it wears out). This has two effects upon respawning universe theories:
The first is that with every contraction (or spawning of a new universe), the universe would loose mechanical energy. To use an analogy I read involving a rubber band, when a rubber band is new its elasticity and energy potential is greatest. After much use, it looses much of its elasticity and is able to be stretched further and further out. In the same way, the law of thermodynamics would compel the expansion of the universe to increase from cycle to cycle due to its loss of energy for contraction. As each cycle increases, the universe might be able to look forward to an infinitely long future, but it would still only have a finite past (since as you go back through every bounce, the expansion of the universes would get smaller and smaller before eventually reaching a "singularity" anyway).
Another problem from entropy also restricts even how many bounces the universe could possibly produce. Another analogy I've read is of a rubber ball being dropped onto a hard and smooth floor. Each bounce will never get to the same height as its previous bounce, but rather the bounce will become smaller and smaller as energy for a bounce is lost. Eventually the bounced will stop. Now the factor which determines how many bounces a ball has is the amount of mechanical efficiency it has. For example, a hard rubber ball may bounce a dozen times, which has a higher mechanical effiency than a soft foam ball which may only bounce twice when dropped from the same height. Yet how much mechanical energy does our universe have? It has been pointed out that in several papers published in Nature that even if the universe contained enough mass to halt its expansion, any ultimate collapse would end in a thud, not a bounce (see Guth, Alan H. and Sher, Marc. "The Impossibility of a Bouncing Universe," in Nature, 302. (1983), pp.505-506; Bludman, Sidney A. "Thermodynamics and the End of a closed Universe," in Nature, 308. (1984), pp.319-322). Applying this idea to the model you've referenced, with each new set of universes spawned, more and more mechanical energy to spawn future universes would be used up. And so, there would still only be enough mechanical energy for a finite amount of universes.
There have been many attempts made to escape a singular beginning of the universe. I personally believe there are certain motivations behind theories like Steinhardt and Turok's, which usually introduces a scalar field working on some unknown physics that acts as a third factor to gravity and the universe's self-stretching property. Yet, most justify invoking their new unsupported theory by pointing to an apparent problem within the broadly accepted inflationary model. This problem is usually the same old one as was answered in my previous post, which to quote a similar article to yours: "
In particular, questions about what happened "before" the Big Bang cannot really be asked because there is supposed to have been "no before" - since there was no time." (
http://www.marxist.com/scienceandtech/big_bang.html) The only people that this problem seems to be an issue for, are materialists who have a distaste for God. This becomes apparent in the same article where it is written: "
In the most widely accepted cosmological model, called the inflationary model, the universe was born in an instantaneous creation of matter and energy. It is the modern equivalent of the old religious dogma of the creation of the world from nothing." Other than this distaste for religion and "apparent" problem, the article does to its credit admit that there is no contradictory data surrounding the inflationary model by citing the Harvard University astrophysicist Robert P. Kirshner, "
The inflation idea has been tremendously influential... No observation's been found that proves it wrong."
One must ask the question why many are so motivated to look for alternative explanations and are so willing to discard such a well evidenced theory in place of one that usually introduces unknown physics to alter physics we do not know, cannot measure nor understand. While speculation and abstract thinking is certainly good, I think it becomes obvious what drives many to look for infinite universe alternatives, especially when a beginning to the universe is seen as "the modern equivalent" of "old religious dogma."
Kurieuo.