9 citations · 18 across the 11 of their papers we have counts for
11 papers
An approach to quasinormal modes of black hole based on reversed harmonic oscillator dynamics
Shigefumi Naka, Haruki Toyoda
The frequencies of quasinormal modes (QNM) for the Schwartzschild black hole are studied from the viewpoint of the particle scattering under an effective Regge-Wheeler type of pote…
Bi-local fields interacting with a constant electric field and related problems including the Schwinger effect
Kenichi Aouda, Naohiro Kanda, Shigefumi Naka +1
The bi-local fields are the quantum fields of two-particle systems, the bi-local, systems, bounded by relativistic potentials. Since those form constrained dynamical systems, it is…
Ladder Operators in Repulsive Harmonic Oscillator with Application to the Schwinger Effect
Kenichi Aouda, Naohiro Kanda, Shigefumi Naka +1
The ladder operators in harmonic oscillator are a well-known strong tool for various problems in physics. In the same sense, it is sometimes expected to handle the problems of repu…
An Approach to Yukawa's Elementary Domain Based on $\mbox{AdS}_5$ Spacetime
Kenichi Aouda, Naohiro Kanda, Shigefumi Naka +1
The field equations of elementary domains proposed by Yukawa in 1968 are studied from the viewpoint of particle embedded $\mbox{AdS}_5$ spacetime with warp factor. The fifth dimens…
Bi-Local Fields in AdS Spacetime
Kenichi Aouda, Shigefumi Naka, Haruki Toyoda
Recently, the bi-local fields attract the interest in studying the duality between vector model and a higher-spin gauge theory in AdS spacetime. In those theories, the bi-lo…
Noncommutative Spacetime Realized in Space
S. Naka, H. Toyoda, T. Takanashi +1
In -Minkowski spacetime, the coordinates are Lie algebraic elements such that time and space coordinates do not commute, whereas space coordinates commute each other. The non-co…