Analogue Hawking temperature of a laser-driven plasma

TL;DR

This paper proposes a method to simulate Hawking radiation using laser pulses in plasma, deriving how the analogue temperature depends on laser parameters and estimating it to be below 25K for typical high-intensity lasers.

Contribution

It introduces a novel approach to generate and analyze analogue Hawking radiation in plasma using laser pulses, including a derivation of the temperature dependence on laser amplitude and spot behavior.

Findings

Analogue Hawking temperature can be estimated from plasma and laser parameters.

For high-intensity near-IR lasers, the temperature is below approximately 25K.

The method links plasma wavelength and laser spot dynamics to Hawking radiation analogues.

Abstract

We present a method for exploring analogue Hawking radiation using a laser pulse propagating through an underdense plasma. The propagating fields in the Hawking effect are local perturbations of the plasma density and laser amplitude. We derive the dependence of the resulting Hawking temperature on the dimensionless amplitude of the laser and the behaviour of the spot area of the laser at the analogue event horizon. We demonstrate one possible way of obtaining the analogue Hawking temperature in terms of the plasma wavelength, and our analysis shows that for a high intensity near-IR laser the analogue Hawking temperature is less than approximately 25K for a reasonable choice of parameters.