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4 papers · 2 filters
Monopole Inflation in Brans-Dicke Theory
Nobuyuki Sakai, Jun'ichi Yokoyama, Kei-ichi Maeda
According to previous work, topological defects expand exponentially without an end if the vacuum expectation value of the Higgs field is of the order of the Planck mass. We extend…
Equivalence of black hole thermodynamics between a generalized theory of gravity and the Einstein theory
Jun-ichirou Koga, Kei-ichi Maeda
We analyze black hole thermodynamics in a generalized theory of gravity whose Lagrangian is an arbitrary function of the metric, the Ricci tensor and a scalar field. We can convert…
Symmetric hyperbolic system in the Ashtekar formulation
Gen Yoneda, Hisa-aki Shinkai
We present a first-order symmetric hyperbolic system in the Ashtekar formulation of general relativity for vacuum spacetime. We add terms from constraint equations to the evolution…
Renormalization Group Approach in Newtonian Cosmology
Y. Sota, T. Kobayashi, K. Maeda +3
We apply the renormalization group (RG) method to examine the observable scaling properties in Newtonian cosmology. The original scaling properties of the equations of motion in ou…