20 citations · 20 across the 1 of their papers we have counts for
3 papers
gr-qc2005★ 20 cited
Accelerating Universe via Spatial Averaging
Yasusada Nambu, Masayuki Tanimoto
We present a model of an inhomogeneous universe that leads to accelerated expansion after taking spatial averaging. The model universe is the Tolman-Bondi solution of the Einstein…
chao-dyn1999
Renormalization group method and canonical perturbation theory
Yoshiyuki Y. Yamaguchi, Yasusada Nambu
Renormalization group method is one of the most powerful tool to obtain approximate solutions to differential equations. We apply the renormalization group method to Hamiltonian sy…
gr-qc1993
Local Structure of Numerically Generated Worm Hole Spacetime
Yasusada Nambu, Masaru Siino
We investigate the evolution of the apparent horizons in a numerically gererated worm hole spacetime. The behavior of the apparent horizons is affected by the dynamics of the matte…