Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501 Bielefeld, Germany.
Phys Rev Lett. 2010 Nov 19;105(21):211302. doi: 10.1103/PhysRevLett.105.211302. Epub 2010 Nov 16.
We show nonperturbatively that the power spectrum of a self-interacting scalar field in de Sitter space-time is strongly suppressed on large scales. The cutoff scale depends on the strength of the self-coupling, the number of e folds of quasi-de Sitter evolution, and its expansion rate. As a consequence, the two-point correlation function of field fluctuations is free from infrared divergencies.
我们非微扰地表明，在德西特时空中自相互作用标量场的功率谱在大尺度上受到强烈抑制。截止尺度取决于自耦合强度、准德西特演化的 e 折叠数及其膨胀率。因此，场涨落的两点相关函数不受红外发散的影响。
