Gauge independence of induced gravitational waves
Keisuke Inomata, Takahiro Terada
Abstract
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 (late-time) GWs in the transverse-traceless (synchronous) gauge and in the Newtonian gauge are the same in contrast to a claim in the literature. We also mention the interpretation of the gauge dependence of the tensor perturbations which appears in the context of the induced GWs.
Topics & Concepts
Gravitational waveGauge (firearms)PhysicsObservableCurvatureContext (archaeology)Interpretation (philosophy)Gauge theoryIndependence (probability theory)Tensor (intrinsic definition)Introduction to gauge theoryQuantum electrodynamicsAstrophysicsMathematical physicsQuantum mechanicsGeologyGeographyMathematicsGeometryPhilosophyLinguisticsStatisticsPaleontologyArchaeologyPulsars and Gravitational Waves ResearchCosmology and Gravitation TheoriesBlack Holes and Theoretical Physics