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Chaos in Static Axisymmetric Spacetimes II : non-vacuum case
Yasuhide Sota, Shingo Suzuki, Kei-ichi Maeda
We examine the effect of local matter on the chaotic behavior of a relativistic test particle in non-vacuum static axisymmetric spacetimes. We find that the sign of the sectional c…
Dynamics of Quiet Universes
Hiraku Mutoh, Toshinari Hirai, Kei-ichi Maeda
We study the stability of a contracting {\it silent universe}, which is a spacetime with irrotational dust and vanishing magnetic part of the Weyl tensor, . Two general r…
Production of Global Monopoles through the Nucleation of Bubbles
Yoonbai Kim, Kei-ichi Maeda, Nobuyuki Sakai
First-order cosmological phase transitions are considered in the models with an -symmetric scalar field, in the high temperature limit. It is shown that a global monopole can…
Dilatonic Black Holes with Gauss-Bonnet Term
Takashi Torii, Hiroki Yajima, Kei-ichi Maeda
We discuss black holes in an effective theory derived from a superstring model, which includes a dilaton field, a gauge field and the Gauss-Bonnet term. Assuming U(1) or SU(2) symm…
Monopole-Bubble in Early Universe
Yoonbai Kim, Kei-ichi Maeda, Nobuyuki Sakai
The nucleation and evolution of bubbles are investigated in the model of an -symmetric scalar field coupled to gravity in the high temperature limit. It is shown that, in add…
Chaos in Schwarzschild Spacetime : The Motion of a Spinning Particle
Shingo Suzuki, Kei-ichi Maeda
We study the motion of a spinning test particle in Schwarzschild spacetime, analyzing the Poincaré map and the Lyapunov exponent. We find chaotic behavior for a particle with spin…