934 citations · 12.9k across the 205 of their papers we have counts for
8 papers · 1 filter
A comment on trans-Planckian physics in inflationary universe
Takahiro Tanaka
There are several works searching for a clue of trans-Planckian physics on the primordial density perturbation spectrum. Here we would like to point out an important aspect which h…
Analytic derivation of the map of null rays passing near a naked singularity
Takahiro Tanaka, T. P. Singh
Recently the energy emission from a naked singularity forming in spherical dust collapse has been investigated. This radiation is due to the particle creation in a curved spacetime…
Naked singularities and quantum gravity
Tomohiro Harada, Hideo Iguchi, Ken-ichi Nakao +3
There are known models of spherical gravitational collapse in which the collapse ends in a naked shell-focusing singularity for some initial data. If a massless scalar field is qua…
Asymptotic Behavior of Perturbations in Randall-Sundrum Brane-World
Takahiro Tanaka
The asymptotic behavior of metric perturbations in Randall-Sundrum infinite brane world is carefully investigated. Perturbations generated by matter fields on the brane are shown t…
Radion effective potential in the Brane-World
Jaume Garriga, Oriol Pujolas, Takahiro Tanaka
We show that in brane-world scenarios with warped extra dimensions, the Casimir force due to bulk matter fields may be sufficient to stabilize the radion field . In particular,…
The use of new coordinates for the template space in hierarchical search for gravitational waves from inspiraling binaries
Takahiro Tanaka, Hideyuki Tagoshi
We discuss a method to analyze data from interferometric gravitational wave detectors focusing on the technique of hierarchical search to detect gravitational waves from inspiralin…