标题： 拓扑缺陷暴胀 显示英文标题

标题： Topological Defect Inflation

摘要： 我们解决了一些拓扑缺陷暴胀的问题。 (1) 我们澄清了膨胀磁单极子的因果结构。 时空图明确显示，这个模型免于“优雅退出”问题，而单极子本身经历“永恒暴胀”。 (2) 我们将膨胀拓扑缺陷的研究扩展到布兰斯-迪克引力。 与爱因斯坦引力的情况相反，在布兰斯-迪克引力中，任何膨胀的单极子最终都会收缩并进入稳定状态。 (3) 我们重新分析了非最小耦合的极大标量场的混沌暴胀。 我们发现了一种新的域墙暴胀解，该解缓解了成功暴胀对耦合常数的约束。 显示英文摘要

摘要： We address some issues of topological defect inflation. (1) We clarify the causal structure of an inflating magnetic monopole. The spacetime diagram shows explicitly that this model is free from the ``graceful exit'' problem, while the monopole itself undergoes ``eternal inflation''. (2) We extend the study of inflating topological defects to Brans-Dicke gravity. Contrary to the case of Einstein gravity, any inflating monopole eventually shrinks and takes a stable configuration. (3) We reanalyze chaotic inflation with a non-minimally coupled massive scalar field. We find a new solution of domain wall inflation, which relaxes constraints on the coupling constant for successful inflation.