Stability conditions for the Bianchi type I anisotropically inflating universe

• Main Authors: Lee, Chuan-Ruei, 李傳睿
• Other Authors: Kao, Win-Fun
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/35763109408408449033

碩士 === 國立交通大學 === 物理研究所 === 98 === The evolution detail of an anisotropically expanding universe is an interesting research focus lately. The no hair conjecture, proved partially by Robert Wald, states that all anisotropically expanding universes will tend to an isotropic de Sitter space. A class of anisotropically expanding solutions are found in ref. [1] for a gravity model with second-order correction terms derived from all possible combinations of the Ricci curvature tensor and Ricci scalar. We will present the correct expanding solutions in this paper. These solutions can be shown to be unstable by perturbing the field equations. Conventional approach by dynamical system analysis used in ref. [1] will be reviewed carefully and compared with the perturbation method mentioned earlier in this paper.