Exact Solution in Chaotic Inflation Model with Negative Potential

• 来源期刊: 中国物理快报(英文版)
• 年，卷（期）: 2003,（4）
• 页码范围: 593-596
• 页数: 4页
• 语种: 英文

摘要

New exact solution to the Einstein equations that describe the evolution of cosmological chaotic inflation model is derived. The inflation is driven by the evolution of scalar field with negative potential V( )=-Vo +1/2m2ψ2.This includes the solution which is exponential inflation for ψo ＞ψ＞ψf , and then develops smoothly towards the radiation-like evolution for ψ＜ψf. The spectral indices of the scalar density ns and the gravitational wave fluctuations ng are computed. The value of ns lies well inside the limits set by the cosmic background explorer satellite.