A Holographic Dual of Bjorken Flow (2008)
Kinoshita, Shunichiro, Mukohyama, Shinji, Nakamura, Shin, Oda, Kin-ya
We propose a consistent setup for a holographic dual of Bjorken flow of strongly coupled large-Nc N=4 SYM-theory plasma. We employ Eddington-Finkelstein type coordinates for the dual geometry, and we...
New branch of Kaluza-Klein compactification (2007)
We found a new branch of solutions in Freund-Rubin type flux compactifications. The geometry of these solutions is described as the external space which has a de Sitter symmetry and the internal...
Constraints on Wrapped DBI Inflation in a Warped Throat (2007)
Kobayashi, Takeshi, Mukohyama, Shinji, Kinoshita, Shunichiro
We derive constraints on the tensor to scalar ratio and on the background charge of the warped throat for DBI inflation driven by D5- and D7-branes wrapped over cycles of the throat. It is shown that...
Instability of de Sitter brane and horizon entropy in a 6D braneworld (2007)
Kinoshita, Shunichiro, Sendouda, Yuuiti, Mukohyama, Shinji
We investigate thermodynamic and dynamical stability of a family of six-dimensional braneworld solutions with de Sitter branes. First, we investigate thermodynamic stability in terms of de Sitter...
A doubly covariant formula of deficit angle and its application to six-dimensional braneworld (2006)
Sendouda, Yuuiti, Kinoshita, Shunichiro, Mukohyama, Shinji
We reformulate boundary conditions for axisymmetric codimension-2 braneworlds in a way which is applicable to linear perturbation with various gauge conditions. Our interest is in the thin brane...
Dynamical Stability of Six-dimensional Warped Flux Compactification (2005)
Yoshiguchi, Hiroyuki, Mukohyama, Shinji, Sendouda, Yuuiti, Kinoshita, Shunichiro
We show the dynamical stability of a six-dimensional braneworld solution with warped flux compactification recently found by the authors. We consider linear perturbations around this background...
Warped Flux Compactification and Brane Gravity (2005)
Mukohyama, Shinji, Sendouda, Yuuiti, Yoshiguchi, Hiroyuki, Kinoshita, Shunichiro
We find a simple exact solution of 6-dimensional braneworld which captures some essential features of warped flux compactification, including a warped geometry, compactification, a magnetic flux, and...
Quadrupole formula for Kaluza-Klein modes in the braneworld (2005)
Kinoshita, Shunichiro, Kudoh, Hideaki, Sendouda, Yuuiti, Sato, Katsuhiko
The quadrupole formula in four-dimensional Einstein gravity is a useful tool to describe gravitational wave radiation. We derive the quadrupole formula for the Kaluza-Klein (KK) modes in the...
Acoustic causality in relativistic shells (2004)
Kinoshita, Shunichiro, Sendouda, Yuuiti, Takahashi, Keitaro
The motion of sound waves propagating in the perfect fluid with inhomogeneous background flow is effectively described as a massless scalar field on a curved space-time. This effective geometry is...