Big bounce
The Big Bounce is a theoretical model of the creation of the universe. It is derived from the model of the oscillating universe . It is assumed that the Big Bang was the result of the collapse ( Big Crunch ) of a previous universe. The term was coined in 1987 by Wolfgang Priester and Hans-Joachim Blome . Current representatives of the big bounce theory are Abhay Ashketar and Martin Bojowald .
motivation
According to the current Big Bang theory, the universe should have had an infinite density at time zero. Such a description would contradict the principle of indeterminacy in quantum mechanics and, because of the singularities that occur, also with the theory of relativity , which would lose its validity on very small length scales in the area of the Planck scale .
The big bounce theory is based on a quantization of space-time and thus avoids the problematic singularities, since all physical quantities can only assume finite values.
Expansion and contraction
Should the current universe end in a big crunch , there should be a successor universe . It is assumed that the universe first had an infinite extent and existed without matter. As a result of a spontaneous symmetry breaking during contraction, mass was generated.
See also
literature
- Martin Bojowald : Back to the Big Bang. The whole history of the universe. S. Fischer, Frankfurt am Main 2009 ISBN 978-3-10-003910-1
Web links
- Penn State Researchers Look Beyond The Birth Of The Universe (Penn State) May 12, 2006
- What Happened Before the Big Bang? (Penn State) July 1, 2007
Individual evidence
- ↑ Penn State Researchers Look Beyond The Birth Of The Universe . In: Science Daily , May 17, 2006. Refering to Abhay Ashtekar, Pawlowski, Tomasz; Singh, Parmpreet: Quantum Nature of the Big Bang . In: Physical Review Letters . 96, 2006, p. 141301.