Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2006-12-13
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
14 pages, added acknowledgements
Scientific paper
We investigate the Liouvillian integrability of Hamiltonian systems describing a universe filled with a scalar field (possibly complex). The tool used is the differential Galois group approach, as introduced by Morales-Ruiz and Ramis. The main result is that the generic systems are non-integrable, although there still exist some values of parameters for which integrability remains undecided. We also draw a connection with chaos present in such cosmological models. The first part of the article deals with minimally coupled fields, and the second treats the conformal couping.
Przybylska Maria
Stachowiak Tomasz
Szydlowski Marek
~Maciejewski Andrzej J.
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