Black holes would survive, but most things would be vaporized. So then that universe is full of matter and radiation again.
All earthly civilization would cease. There would be nowhere to escape. However, as Steinhardt relates, you could try to contact any intelligent souls in future eras, providing them with some inkling that our culture once existed:
You might be able to send messages, although [respondents] would be pretty rare. A black hole survives, so you could make an arrangement of black holes that spell out ‘Hello.’ The problem is that during this period of accelerated expansion, the universe has expanded exponentially. So the only people able to read that message are people right near where you were. That’s a very small fraction of the total population of the universe. We can only see 14 billion light-years today, so the chances of communicating with civilizations spread out [to the extent of] maybe one every hundreds of trillions is negligible. So you can only send messages to your local neighborhood at best.
Unlike the Tolman model, this sequence of events could repeat itself forever, because the accelerating phase dilutes the entropy for a given region, before it fills with new matter and energy. It serves as a conveyer belt to remove the scraps from the table, before new help-ings are served. What an efficient cosmic cafeteria.
Despite their clever attempt to use M-theory to resolve cosmological issues, Steinhardt and Turok’s model has been met with skepticism by string theorists as well as cosmologists. Many string theorists believe that the model isn’t ready to be used in a dynamic description of the evolution of the cosmos. Many cosmologists, on the other hand, ardently believe in the inflationary model, the anthropic principle, or other longstanding resolutions of the horizon and flatness problems.
Many mainstream physicists and astronomers simply aren’t used