Analogue Hawking temperature of a laser-driven plasma

Fiedler, Cezary and Burton, David (2021) Analogue Hawking temperature of a laser-driven plasma. Physics Letters A, 403: 127380. ISSN 0375-9601

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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.