自放大霍金辐射及其背景的数值研究
Self-amplifying Hawking radiation and its background: a numerical study
摘要：
我们数值研究了一个类似的黑洞的两个视界与最近的实验相似的参数。我们发现，霍金辐射存在于一个包含密度振荡的背景上。霍金辐射由自发辐射向自放大辐射演化，而背景波纹稳定增长，没有发生质的变化。可以看出，自放大的霍金辐射具有非零频率。与预测相反，背景波纹甚至在内部视界形成之前就出现了。这项工作与最近观察到的自放大霍金辐射一致，并解释了所看到的一些特征。与最近的工作相比，我们的研究区分观察到的霍金辐射和背景的演变。
英文摘要：
We numerically study an analogue black hole with two horizons with similar parameters to a recent experiment. We find that the Hawking radiation exists on a background which contains a density oscillation, a zero-frequency ripple. The Hawking radiation evolves from spontaneous to self-amplifying, while the background ripple grows steadily with no qualitative change. It is seen that the self-amplifying Hawking radiation has a non-zero frequency. The background ripple appears even before the inner horizon is created, in contrast to predictions. This work is in agreement with the recent observation of self-amplifying Hawking radiation, and explains some of the features seen. In contrast to recent works, our study differentiates between the Hawking radiation observed, and the evolution of the background.
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