论文标题
不引人注目的经典背景
Unexciting classical backgrounds
论文作者
论文摘要
时间相关背景中的量子场通常会导致粒子产生。在这里，我们考虑了净粒子产生消失的“引人注目的”背景。我们首先考虑简单的谐波振荡器，然后明确构建所有不引人注目的时间依赖性频率。这使我们能够在野外理论中构造同质背景，在任何给定模式下都没有粒子的产生，尽管我们能够证明粒子产生在每种模式下都没有均匀的背景。然后，我们构建了普通的不均匀的无神论场理论背景。所有不引人注目的现场理论背景的集合将受到物理相互作用的选择进一步限制，这导致了一个有趣的开放问题。
Quantum fields in time-dependent backgrounds generally lead to particle production. Here we consider "unexciting" backgrounds for which the net particle production vanishes. We start by considering the simple harmonic oscillator and explicitly construct all unexciting time-dependent frequencies. This allows us to construct homogeneous backgrounds in field theory for which there is no particle production in any given mode, though we are able to show that there are no homogeneous backgrounds for which the particle production vanishes in every mode. We then construct general inhomogeneous unexciting field theory backgrounds. The set of all unexciting field theory backgrounds will be further restricted by the choice of physical interactions and this leads to an interesting open problem.
