Ando, Masaki, Kawamura, Seiji, Sato, Shuichi, Nakamura, Takashi, Tsubono, Kimio, Araya, Akito, ...
DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory), which is a future space gravitational wave antenna. DECIGO is expected...
Ando, Masaki, Kawamura, Seiji, Nakamura, Takashi, Tsubono, Kimio, Tanaka, Takahiro, Funaki, Ikkoh, ...
DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory) which is a future space gravitational wave antenna. DECIGO is expected...
The Japanese space gravitational wave antenna; DECIGO (2008)
Kawamura, Seiji, Ando, Masaki, Nakamura, Takashi, Tsubono, Kimio, Tanaka, Takahiro, Funaki, Ikkoh, ...
DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese space gravitational wave antenna. DECIGO is expected to open a new window of observation for gravitational...
Effective Search Templates for a Primordial Stochastic Gravitational Wave Background (2007)
Chiba, Takeshi, Himemoto, Yoshiaki, Yamaguchi, Masahide, Yokoyama, Jun'ichi
We calculate the signal-to-noise ratio (SNR) of the stochastic gravitational-wave background in an extreme case that its spectrum has a sharp falloff with its amplitude close to the detection...
Himemoto, Yoshiaki, Taruya, Atsushi, Kudoh, Hideaki, Hiramatsu, Takashi
We discuss a robust data analysis method to detect a stochastic background of gravitational waves in the presence of non-Gaussian noise. In contrast to the standard cross-correlation (SCC) statistic...
Detecting a gravitational-wave background with next-generation space interferometers (2005)
Kudoh, Hideaki, Taruya, Atsushi, Hiramatsu, Takashi, Himemoto, Yoshiaki
Future missions of gravitational-wave astronomy will be operated by space-based interferometers, covering very wide range of frequency. Search for stochastic gravitational-wave backgrounds (GWBs) is...
Gravity in Randall-Sundrum two D-brane model (2004)
Shiromizu, Tetsuya, Takahashi, Keitaro, Himemoto, Yoshiaki, Yamamoto, Shuto
We analyse Randall-Sundrum two D-brane model by linear perturbation and then consider the linearised gravity on the D-brane. The qualitative contribution from the Kaluza-Klein modes of gauge fields...
Randall-Sundrum two D-brane model (2004)
Shiromizu, Tetsuya, Himemoto, Yoshiaki, Takahashi, Keitaro
In Randall-Sundrum two D-brane system we derive the gravitational theory on the branes. It is turned out from the consistency that one D-brane has the negative tension brane under Randall-Sundrum...
Geometry and cosmological perturbations in the bulk inflaton model (2003)
Minamitsuji, Masato, Himemoto, Yoshiaki, Sasaki, Misao
We consider a braneworld inflation model driven by the dynamics of a scalar field living in the 5-dimensional bulk, the so-called ``bulk inflaton model'', and investigate the geometry in the bulk and...
Braneworld inflation driven by dynamics of a bulk scalar field (2003)
Himemoto, Yoshiaki, Sasaki, Misao
We review a viable alternative scenario of the inflationary universe in the context of the Randall-Sundrum (RS) braneworld. In this scenario, the dynamics of a 5-dimensional scalar field, which we...
Generation of dark radiation in the bulk inflaton model (2003)
Tanaka, Takahiro, Himemoto, Yoshiaki
We investigate the dynamics of a bulk scalar field with various decay channels in the Randall-Sundrum infinite braneworld scenario. A bulk scalar field in this scenario has a quasi-localized mode...
Braneworld reheating in the bulk inflaton model (2002)
Himemoto, Yoshiaki, Tanaka, Takahiro
In the context of the braneworld inflation driven by a bulk scalar field, we study the energy dissipation from the bulk scalar field into the matter on the brane in order to understand the reheating...
Bulk scalar field in the braneworld can mimic the 4D inflaton dynamics (2001)
Himemoto, Yoshiaki, Tanaka, Takahiro, Sasaki, Misao
Based on the recently proposed scenario of inflation driven by a bulk scalar field in the braneworld of the Randall-Sundrum (RS) type, we investigate the dynamics of a bulk scalar field on the...
Quantum fluctuations in brane-world inflation without inflaton on the brane (2001)
Sago, Norichika, Himemoto, Yoshiaki, Sasaki, Misao
A Randall-Sundrum type brane-cosmological model in which slow-roll inflation on the brane is driven solely by a bulk scalar field was recently proposed by Himemoto and Sasaki. We analyze their model...
After bulky brane inflation (2001)
Yokoyama, Jun'ichi, Himemoto, Yoshiaki
Reheating or entropy production on the three-brane from a decaying bulk scalar field is studied in the brane-world picture of the Universe. It is shown that a significant amount of dark radiation is...
Brane-world inflation without inflaton on the brane (2000)
Himemoto, Yoshiaki, Sasaki, Misao
Inspired by the Randall-Sundrum brane-world scenario, we investigate the possibility of brane-world inflation driven not by an inflaton field on the brane, but by a bulk, dilaton-like gravitational...
Himemoto, Yoshiaki, Tanaka, Takahiro
The Hawking radiation is one of the most interesting phenomena predicted by the theory of quantum field in curved space. The origin of Hawking radiation is closely related to the fact that a particle...