标题： 量子费米子超辐射和带电黑洞上的真空歧义 显示英文标题

标题： Quantum fermion superradiance and vacuum ambiguities on charged black holes

摘要： 不同于经典的带电玻色场，在静态带电黑洞上的经典带电费米子场不会表现出超辐射散射。 我们证明了这个经典过程的量子类似物确实存在。 我们构建了一个费米子场的真空态，该态从过去光无穷远处没有入射粒子，但在将来光无穷远处含有非热粒子流。 这种态描述了黑洞的放电和能量损失，我们分析了这一现象的解释如何依赖于定义量子真空时固有的歧义。 显示英文摘要

摘要： Unlike a classical charged bosonic field, a classical charged fermion field on a static charged black hole does not exhibit superradiant scattering. We demonstrate that the quantum analogue of this classical process is however present. We construct a vacuum state for the fermion field which has no incoming particles from past null infinity, but which contains, at future null infinity, a nonthermal flux of particles. This state describes both the discharge and energy loss of the black hole, and we analyze how the interpretation of this phenomenon depends on the ambiguities inherent in defining the quantum vacuum.