80 citations · 440 across the 45 of their papers we have counts for
4 papers · 1 filter
Beyond Zel'dovich-Type Approximations in Gravitational Instability Theory --- Padé Prescription in Spheroidal Collapse ---
Takahiko Matsubara, Ayako Yoshisato, Masahiro Morikawa
Among several analytic approximations for the growth of density fluctuations in the expanding Universe, Zel'dovich approximation in Lagrangian coordinate scheme is known to be unus…
Accuracy of Nonlinear Approximations in Spheroidal Collapse --- Why are Zel'dovich-type approximations so good? ---
Ayako Yoshisato, Takahiko Matsubara, Masahiro Morikawa
Among various analytic approximations for the growth of density fluctuations in the expanding Universe, Zel'dovich approximation and its extensions in Lagrangian scheme are known t…
Dissipative Quantum Tunneling from Quantum Potential Approach -- Back Reaction of Particle Creation --
Fumiaki Shibata, Masahiro Morikawa, Tetsuya Shiromizu +1
Back reaction of the particle creation on the quantum tunneling process is analyzed in real time formalism. We use quantum potential method in which whole quantum dynamics is exact…
Classicalization of Quantum Fluctuation in Inflationary Universe
H. Kubotani, T. Uesugi, M. Morikawa +1
We discuss the classicalization of a quantum state induced by an environment in the inflationary stage of the universe. The classicalization is necessary for the homogeneous ground…