粒子产生过程中的能流特征：黑洞的诞生与死亡
Signatures of Energy Flux in Particle Production: A Black Hole Birth Cry and Death Gasp
摘要：
最近有人认为，如果霍金辐射过程是幺正的，那么黑洞的质量就不可能单调递减。利用动镜方法研究了非平凡共形真空中的粒子数和负能流随时间的变化。提出了一种新的、精确的酉解，它发出一个特征性的超热正能量爆发、一个热平台和负能量通量。结果表明，在粒子外流中观察到特征的正能量耀斑和热平台。然而，随时间变化的粒子产生的结果显示没有明显的负能量通量的迹象。因此，一个黑洞的出生哭声可以通过粒子计数被渐近观测者检测到，而它的死亡喘息却不能。
英文摘要：
It is recently argued that if the Hawking radiation process is unitary, then a black hole's mass cannot be monotonically decreasing. We examine the time dependent particle count and negative energy flux in the non-trivial conformal vacuum via the moving mirror approach. A new, exactly unitary solution is presented which emits a characteristic above-thermal positive energy burst, a thermal plateau, and negative energy flux. It is found that the characteristic positive energy flare and thermal plateau is observed in the particle outflow. However, the results of time dependent particle production show no overt indication of negative energy flux. Therefore, a black hole's birth cry is detectable by asymptotic observers via particle count, whereas its death gasp is not.
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