32 citations · 265 across the 16 of their papers we have counts for
16 papers
Gravitational waves from dark matter collapse in a star
Yasunari Kurita, Hiroyuki Nakano
We investigate the collapse of clusters of weakly interacting massive particles (WIMPs) in the core of a Sun-like star and the possible formation of mini-black holes and the emissi…
Teichmüller parameters for multiple BTZ black hole spacetime
Yasunari Kurita, Masaru Siino
We investigate the Teichmüller parameters for a Euclidean multiple BTZ black hole spacetime. To induce a complex structure in the asymptotic boundary of such a spacetime, we consid…
Dynamical instability in a relativistic cylindrical shell composed of counter rotating particles
Yasunari Kurita, Ken-ichi Nakao
We give a perturbative analysis for an infinitesimally thin cylindrical shell composed of counter rotating collisionless particles, originally devised by Apostolatos and Thorne. Th…
Particle creation in Bose--Einstein condensates: Theoretical formulation based on conserving gapless mean field theory
Yasunari Kurita, Michikazu Kobayashi, Hideki Ishihara +1
We formulate particle creation phenomena in Bose--Einstein condensates in terms of conserving gapless mean field theory for weakly interacting Bose gases. The particle creation spe…
Relativistic Gravitational Collapse of a Cylindrical Shell of Dust II: Settling Down Boundary Condition
Ken-ichi Nakao, Tomohiro Harada, Yasunari Kurita +1
We numerically study the dynamics of an imploding hollow cylinder composed of dust. Since there is no cylindrical black hole in 4-dimensional spacetime with physically reasonable e…
Spacetime analogue of Bose-Einstein condensates: Bogoliubov-de Gennes formulation
Yasunari Kurita, Michikazu Kobayashi, Takao Morinari +2
We construct quantum field theory in an analogue curved spacetime in Bose-Einstein condensates based on the Bogoliubov-de Gennes equations, by exactly relating quantum particles in…