Our Universe from the cosmological constant
  In this article, we consider a bouncing Universe, as described for example by
Loop Quantum Cosmology. If the current acceleration is due to a true
cosmological constant, this constant is naturally conserved through the bounce
and the Universe should also be in a (contracting) de Sitter phase in the
remote past. We investigate here the possibility that the de Sitter temperature
in the contracting branch fills the Universe with radiation and causes the
bounce and the subsequent inflation and reheating. We also consider the
possibility that this gives rise to a cyclic model of the Universe and suggest
some possible tests.
