214 citations · 1.6k across the 81 of their papers we have counts for
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Black hole formation in the grazing collision of high-energy particles
Hirotaka Yoshino, Yasusada Nambu
We numerically investigate the formation of D-dimensional black holes in high-energy particle collision with the impact parameter and evaluate the total cross section of the black…
Long-wavelength Cosmological Perturbation in the Universe with Multiple Perfect Fluids
Yasusada Nambu, Shin-ichi Ohokata
We investigate the large scale cosmological perturbation in the Universe with multiple perfect fluids. Using the long-wavelength approximation with Hamilton-Jacobi method, we deriv…
High-energy head-on collisions of particles and hoop conjecture
Hirotaka Yoshino, Yasusada Nambu
We investigate the apparent horizon formation for high-energy head-on collisions of particles in multi-dimensional spacetime. The apparent horizons formed before the instance of pa…
The back reaction and the effective Einstein's equation for the Universe with ideal fluid cosmological perturbations
Yasusada Nambu
We investigate the back reaction of cosmological perturbations on the evolution of the Universe using the renormalization group method. Starting from the second order perturbed Ein…