Enhanced Black Hole Horizon Fluctuations

TL;DR

This paper investigates how quantum horizon fluctuations, especially those amplified by squeezed states, affect black hole radiation, finding that they can alter stimulated emission but do not compromise the thermal nature of Hawking radiation.

Contribution

It introduces the concept of enhanced horizon fluctuations due to squeezed states and analyzes their impact on black hole radiance, demonstrating the robustness of Hawking radiation's thermal spectrum.

Findings

Enhanced fluctuations can significantly modify stimulated emission.

Spontaneous emission remains largely unaffected by horizon fluctuations.

The thermal spectrum of Hawking radiation is robust against quantum horizon fluctuations.

Abstract

We discuss the possible role of quantum horizon fluctuations on black hole radiance, especially whether they can invalidate Hawking's analysis based upon transplanckian modes. We are particularly concerned with ``enhanced'' fluctuations produced by gravitons or matter fields in squeezed vacuum states sent into the black hole after the collapse process. This allows for the possibility of increasing the fluctuations well above the vacuum level. We find that these enhanced fluctuations could significantly alter stimulated emission but have little effect upon the spontaneous emission. Thus the thermal character of the Hawking radiation is remarkably robust.