标题： 更多场不同：多场暴胀情景的随机观点 显示英文标题

标题： More fields are different: Stochastic view of multi-field inflationary scenario

摘要： 高能物理经常推动多场暴胀情景，其中随机效应起着关键作用。 多场模型特有的噪声引起的离心力会导致暴胀持续时间更长，这取决于场的数量，即使随机噪声本身很小。 我们表明，在这种小噪声情况下，场的数量通常会区分暴胀是否成功终止或永远持续。 我们的结果表明，具有极大量场的暴胀可能无法实现我们的可观测宇宙。 显示英文摘要

摘要： High-energy physics often motivates multi-field inflationary scenarios where stochastic effects play a crucial role. Peculiar to multi-field models, the noise-induced centrifugal force results in a longer duration of inflation depending on the number of fields, even when the stochastic noises themselves are small. We show that, in such small-noise regimes, the number of fields generically discriminates whether inflation successfully terminates or lasts forever. Our results indicate that inflation with an extremely large number of fields may fail to realise our observable Universe.