黃偉彥臺灣大學：天文物理研究所吳尚育Wu, Shang-YuShang-YuWu2007-11-262018-06-282007-11-262018-06-282006http://ntur.lib.ntu.edu.tw//handle/246246/52031The energy scale during preheating after inflation can be very high, namely, about 1013GeV. In this thesis, we investigate the preheating theory by introducing higher- order coupling terms to extend the preheating theory after inflation to high energy scale and try to verify the robustness of the preheating theory. We find that the preheating theory is robust only for small coupling constants. Higher-order coupling terms might enhance or suppress the parametric resonance, and lead to the preheating more or less efficient.Chapter 1 Introduction 7 Chapter 2 FRW cosmology and inflation 9 2.1 A brief review of FRW big bang standard cosmology 2.2 Inflation Chapter 3 Reheating 13 3.1 Elementary theory of reheating – perturbative decay 3.2 Preheating 3.2.1 Parametric resonance 3.2.2 Stochastic resonance Chapter 4 Higher-order coupling corrections 29 4.1 Motivation 4.2 Analytical calculation 4.3 Numerical results Chapter 5 Summary and prospects 45 Appendix 49 Appendix A Quantum field theory in a time- dependent background Bibliography 53641382 bytesapplication/pdfen-US預熱理論暴漲PreheatingInflationotherhttp://ntur.lib.ntu.edu.tw/bitstream/246246/52031/1/ntu-95-R92244001-1.pdf