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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…
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,…