Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2010-04-20
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
15 pages, 10 figures; review for CQG special issue
Scientific paper
In this paper I review the theory and numerical simulations of non-linear dynamics of preheating, a stage of dynamical instability at the end of inflation during which homogeneous inflaton explosively decays and deposits its energy into excitation of other matter fields. I focus on preheating in chaotic inflation models, which proceeds via broad parametric resonance. I describe a simple method to evaluate Floquet exponents, calculating stability diagrams of Mathieu and Lame equations describing development of instability in $m^2\phi^2$ and $\lambda\phi^4$ preheating models. I discuss basic numerical methods and issues, and present simulation results highlighting non-equilibrium transitions, topological defect formation, late-time universality, turbulent scaling and approach to thermalization. I explain how preheating can generate large-scale primordial (non-Gaussian) curvature fluctuations manifest in cosmic microwave background anisotropy and large scale structure, and discuss potentially observable signatures of preheating.
No associations
LandOfFree
Non-linear Dynamics and Primordial Curvature Perturbations from Preheating does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Non-linear Dynamics and Primordial Curvature Perturbations from Preheating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-linear Dynamics and Primordial Curvature Perturbations from Preheating will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-325618