7 citations · 16 across the 21 of their papers we have counts for
12 papers · 1 filter
Stability of S-brane singular solutions and expansion of the universe
Riuji Mochizuki, Kenji Ikegami
We investigate stability of single S-brane singular solutions obtained in our previous papers. A stable perturbative solution exists for each of them, while an unstable one exists…
A necessary condition for brane solutions to have their origins in string field theory
Riuji Mochizuki, Kenji Ikegami
We present a necessary condition for brane solutions to have their origins in string field theory. For such solutions, T-duality operations between IIA and IIB solutions should be…
T-duality and dimensional reduction of S-brane solutions
Riuji Mochizuki, Kenji Ikegami
We studied dimensional reduction and T-duality in spacelike brane solutions of 10 or 11 dimensional supergravity, including spacelike counterparts of wave and monopole solutions. D…
Eternally inflating cosmologies from intersecting spacelike branes
Riuji Mochizuki
Intersecting spacelike braneworld cosmologies are investigated. The time axis is set on the scale parameter of extra space, which may include more than one timelike metric. Obtaine…
Eternally accelerating spacelike braneworld cosmologies
Riuji Mochizuki
We construct an eternally inflating spacelike brane world model. If the space dimension of the brane is three (SM2) or six (SM5) for M theory or four (SD3) for superstring theory,…
Back Reaction to Rotating Detector
Takayuki Suga, Riuji Mochizuki, Kenji Ikegami
It has been a puzzle that rotating detector may respond even in the appropriate vacuum defined via canonical quantization. We solve this puzzle by taking back reaction of the detec…
Energy Radiation from a Moving Mirror with Finite Mass
Riuji Mochizuki, Kenji Ikegami, Takayuki Suga
In this paper we study energy radiation from a moving mirror in 1+1 dimensional space-time. The mirror is assumed to have finite mass and accordingly to receive back reaction from…
The Stochastic Quantization Method in Phase Space and a New Gauge Fixing Procedure
R. Mochizuki
We study the stochastic quantization of the system with first class constraints in phase space. Though the Langevin equations of the canonical variables are defined without ordinar…
Dynamical Symmetry Breaking on Langevin Equation : Nambu Jona-Lasinio Model
K. Ikegami, R. Mochizuki, K. Yoshida
In order to investigate dynamical symmetry breaking, we study NambuJona-Lasinio model in the large-N limit in the stochastic quantization method. Here in order to solve Lang…
Large N Limit on Langevin Equation: Two-Dimensional Nonlinear Sigma Model
R. Mochizuki, K. Yoshida
We study the stochastic quantization of two-dimensional nonlinear sigma model in the large limit. Our main tool is the {\it effective} Langevin equation with which we investiga…
(D+1)-Dimensional Formulation for D-Dimensional Constrained Systems
R. Mochizuki, K. Yoshida
D-dimensional constrained systems are studied with stochastic Lagrangian and\break Hamiltonian. It is shown that stochastic consistency conditions are second class constraints and…
Treatment of Constraints in Stochastic Quantization Method and Covariantized Langevin Equation
K. Ikegami, T. Kimura, R. Mochizuki
We study the treatment of the constraints in stochastic quantization method. We improve the treatment of the stochastic consistency condition proposed by Namiki et al. by suitably…