On the gauge invariance of cosmological gravitational waves
V. De Luca, G. Franciolini, A. Kehagias, A. Riotto
Abstract
The issue of the gauge invariance of gravitational waves arises if they are produced in the early universe at second-order in perturbation theory. We address it by dividing the discussion in three parts: The production of gravitational waves, their propagation in the real universe, and their measurement.
Topics & Concepts
PhysicsGravitational waveGauge theoryGravitationCosmological perturbation theoryGauge (firearms)UniverseClassical mechanicsTheoretical physicsPerturbation (astronomy)Introduction to gauge theoryGravitational redshiftMetric expansion of spaceFlatness problemCosmologySpeed of gravityQuantum electrodynamicsPerturbation theory (quantum mechanics)Gravitational fieldGauge bosonMathematical physicsGravitational anomalyCosmological modelInvariant (physics)Cosmology and Gravitation TheoriesPulsars and Gravitational Waves ResearchRelativity and Gravitational Theory