论文标题
斧头辅助施温格效应中的瞬时现象
Transient phenomena in the axion assisted Schwinger effect
论文作者
论文摘要
由时间依赖的背景诱导的粒子产生被充分理解为随时间进化的初始状态在一组最终状态上的投影。虽然渐近初始状态和最终状态以通常的方式定义，但在外部田地存在下，在中间时间的颗粒和反粒子的定义是模棱两可的。此外，这些外部磁场会引起需要正则化的分歧。在本文中，我们阐明了在均匀轴承背景下物理量的瞬态效应计算中的一些微妙之处，包括背景电磁场中的schwinger产生。在调节理论并计算真空贡献对费米的能量时，轴心的存在需要特殊的护理以及对紫外线理论的知识。
Particle production induced by a time-dependent background is well understood as the projection of the time-evolved initial state onto a set of final states. While the asymptotic initial and final states are well defined in the usual way, the definition of particles and antiparticles at intermediate times in the presence of external fields is ambiguous. These external fields moreover induce divergences which require regularization. In this paper we clarify some subtleties in the computation of transient effects in physical quantities for fermions in a homogeneous axion background, including Schwinger production in background electromagnetic fields. The presence of the axion requires particular care as well as knowledge of the UV theory when regulating the theory and computing the vacuum contribution to the fermion energy.
