论文标题
对非扰动过程和量子化与经典化的扰动理解
Perturbative Understanding of Non-Perturbative Processes and Quantumization versus Classicalization
论文作者
论文摘要
在某些研究经典背景的量子演化的情况下，以半经典的方式以对系统进行处理的价格，不可避免地诉诸非扰动方法。我们表明，一种完全量子扰动的处理，其中背景被解析为多粒子状态，可恢复半经典的非扰动结果并允许超越。我们在两个标量的理论以及标量的QED中，在高多样性的散射过程方面，通过经典领域的粒子创造。多粒子处理还提供了一个透明的图片，说明了为什么单程过程从经典状态到量子状态的单程化过渡被指数抑制，而如果经典状态的微层面脱位率很高，则相反的过程可以迅速进行。 $ n $ graviton的黑洞肖像提供了一个示例：黑洞可以通过$ 2 \ to n $经典过程有效地形成高能粒子，但是通过衰减$ n \至2 $量化其量子化被置于量子上。
In some instances of study of quantum evolution of classical backgrounds it is considered inevitable to resort to non-perturbative methods at the price of treating the system semiclassically. We show that a fully quantum perturbative treatment, in which the background is resolved as a multi-particle state, recovers the semiclassical non-perturbative results and allows going beyond. We reproduce particle-creation by a classical field in a theory of two scalars as well as in scalar QED in terms of scattering processes of high multiplicity. The multi-particle treatment also gives a transparent picture of why a single-process transition from a classical to a quantum state, which we call quantumization, is exponentially suppressed, whereas the opposite process, classicalization, can take place swiftly if the microstate degeneracy of the classical state is high. An example is provided by the $N$-graviton portrait of a black hole: a black hole can form efficiently via a $2\to N$ classicalization process in the collision of high-energy particles but its quantumization via a decay $N \to 2$ is exponentially suppressed.
