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4 papers · 2 filters
Dynamics of Gravitating Magnetic Monopoles
Nobuyuki Sakai
According to previous work on magnetic monopoles, static regular solutions are nonexistent if the vacuum expectation value of the Higgs field is larger than a critical value $η…
Cosmic Colored Black Holes
Takashi Torii, Kei-ichi Maeda, Takashi Tachizawa
We present spherically symmetric static solutions (a particle-like solution and a black hole solution) in the Einstein-Yang-Mills system with a cosmological constant.Although their…
Dynamics of Topological Defects and Inflation
Nobuyuki Sakai, Hisa-aki Shinkai, Takashi Tachizawa +1
We study the dynamics of topological defects in the context of ``topological inflation" proposed by Vilenkin and Linde independently. Analysing the time evolution of planar domain…
Chaos in Static Axisymmetric Spacetimes I : Vacuum Case
Y. Sota, S. Suzuki, K. Maeda
We study the motion of test particle in static axisymmetric vacuum spacetimes and discuss two criteria for strong chaos to occur: (1) a local instability measured by the Weyl curva…