Mixmaster: Fact and Belief

Autor(en)

Johannes Markus Heinzle, Claes Uggla

Abstrakt

We consider the dynamics towards the initial singularity of Bianchi type IX vacuum and orthogonal perfect fluid models with a linear equation of state. Surprisingly few facts are known about the 'Mixmaster' dynamics of these models, while at the same time most of the commonly held beliefs are rather vague. In this paper, we use Mixmaster facts as a base to build an infrastructure that makes it possible to sharpen the main Mixmaster beliefs. We formulate explicit conjectures concerning (i) the past asymptotic states of type IX solutions and (ii) the relevance of the Mixmaster/Kasner map for generic past asymptotic dynamics. The evidence for the conjectures is based on a study of the stochastic properties of this map in conjunction with dynamical systems techniques. We use a dynamical systems formulation, since this approach has so far been the only successful path to obtain theorems, but we also make comparisons with the 'metric' and Hamiltonian 'billiard' approaches.

Organisation(en)

Gravitationsphysik

Externe Organisation(en)

Karlstad University

Journal

Classical and Quantum Gravity

Band

26

Anzahl der Seiten

28

ISSN

0264-9381

DOI

https://doi.org/10.1088/0264-9381/26/7/075016

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

103028 Relativitätstheorie, 103019 Mathematische Physik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/b7bfda16-582f-431d-a2e1-b57ae834a68d