作 者: ;
机构地区: 中国科学院理论物理研究所
出 处: 《物理》 2005年第9期643-647,共5页
摘 要: 超弦理论从根本上改变了人们对时空的看法,时空在弦论中只是一种宏观体现.弦论中的非经典时空影响早期宇宙的发展,在一些观测宇宙学的实验中人们也许会发现弦论的效应,例如微波背景辐射的功率谱的反常.最近发现的暗能量也对弦论宇宙学提出了挑战. Space-time has become an emergent concept in string theory, but we still lack a fundamental formulation of string theory in a time dependent background. String effects may possibly be first discovered in certain experiments in observational cosmology, such as the power spectrum measurements of the cosmic microwave background. The newly discovered dark energy may constitute the most important challenge to string theory.