154 citations · 755 across the 52 of their papers we have counts for
52 papers
ICRC2023 Proceedings: Proposal of a gauge-invariant treatment of -mode perturbations on the Schwarzschild background spacetime
Kouji Nakamura
A gauge-invariant perturbation theory on a generic background spacetime is developing from 2003 and ``zero-mode problem'' for linear metric perturbations was proposed as the essent…
Gauge-invariant perturbation theory on the Schwarzschild background spacetime Part III: -- Realization of exact solutions
Kouji Nakamura
This is the Part III paper of our series of papers on a gauge-invariant perturbation theory on the Schwarzschild background spacetime. After reviewing our general framework of the…
Gauge-invariant perturbation theory on the Schwarzschild background spacetime Part II: -- Even-mode perturbations
Kouji Nakamura
This is the Part II paper of our series of papers on a gauge-invariant perturbation theory on the Schwarzschild background spacetime. After reviewing our general framework of the g…
Gauge-invariant perturbation theory on the Schwarzschild background spacetime Part I : -- Formulation and odd-mode perturbations
Kouji Nakamura
This is the Part I paper of our series of full papers on a gauge-invariant {\it linear} perturbation theory on the Schwarzschild background spacetime which was briefly reported in…
Quantum noise and vacuum fluctuations in balanced homodyne detections through ideal multi-mode detectors
Kouji Nakamura
The balanced homodyne detection as a readout scheme of gravitational-wave detectors is carefully examined from the quantum field theoretical point of view. The readout scheme in gr…
Formal solutions of any-order mass, angular-momentum, dipole perturbations on the Schwarzschild background spacetime
Kouji Nakamura
Formal solutions of any-order mass, angular-momentum, dipole perturbations on the Schwarzschild background spacetime are derived in a gauge-invariant manner. Once we accept the pro…