Cosmological gravitational waves from isocurvature fluctuations
Guillem Domènech
Abstract
Abstract Gravitational waves induced by large primordial curvature fluctuations may result in a sizable stochastic gravitational wave background. Interestingly, curvature fluctuations are gradually generated by initial isocurvature fluctuations, which in turn induce gravitational waves. Initial isocurvature fluctuations commonly appear in multi-field models of inflation as well as in the formation of scattered compact objects in the very early universe, such as primordial black holes and solitons like oscillons and cosmic strings. Here, we provide a review on isocurvature induced gravitational waves and its applications to dark matter and the primordial black hole dominated early universe.
Topics & Concepts
PhysicsGravitational wavePrimordial black holePrimordial fluctuationsInflation (cosmology)CurvatureUniverseAstrophysicsCosmologyClassical mechanicsTheoretical physicsCosmic microwave backgroundBinary black holeQuantum mechanicsMathematicsGeometryAnisotropyCosmology and Gravitation TheoriesBlack Holes and Theoretical PhysicsGeophysics and Gravity Measurements