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While reading this paper (https://arxiv.org/abs/1409.6550), I got a little bit puzzled: what is the difference between Hawking radiation and a black hole laser? Is it the same thing? From my understanding, is black hole laser just an amplified Hawking radiation?

Can it be thought like this: if sunlight is analogous to Hawking radiation with randomly emitted particles, then the optical laser is analogous to the black hole laser?

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  • $\begingroup$ There is no “black hole laser”. In this paper the authors describe an unrelated electromagnetic effect that they believe to be conceptually similar (“analogous”) to a gravitational black hole. They use a laser to amplify the radiation in their setup that they believe to be “analogous” to the Hawking radiation. Perhaps it is with pointing out their deliberately improper English: “an analog black hole” should be “an analog of a black hole” while “We observe Hawking radiation emitted by the black hole” is false since there is no black hole or Hawking radiation in their setup. $\endgroup$
    – safesphere
    Commented Jun 20 at 6:45

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