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gr-qc2020★ 21 cited
Analytic solutions of scalar perturbations induced by scalar perturbations
Keisuke Inomata
We study scalar perturbations induced by scalar perturbations through the non-linear interaction appearing at second order in perturbations. We derive analytic solutions of the ind…
gr-qc2020★ 127 cited
Gauge Independence of Induced Gravitational Waves
Keisuke Inomata, Takahiro Terada
We study gauge (in)dependence of the gravitational waves (GWs) induced from curvature perturbations. For the GWs produced in a radiation-dominated era, we find that the observable…