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- TL;DR Summary
- Are there any ways to supress the evaporation of a black hole via Hawking radiation?

A very massive charged black hole could reach a near-extremal state in the right conditions supressing the rate of emission of Hawking radiation (https://physics.stackexchange.com/questions/490524/evaporation-of-large-charged-black-holes)

Meanwhile, the radiation emitted by a black hole can be confined through various mechanisms like massive fields, magnetic fields, anti-de Sitter boundaries or nonlinear interactions (arxiv.org/abs/1501.06570). This confined radiation could return to the black hole. Applied to Hawking radation this would mean that the black hole would not lose its mass to this emission

Could these mechanisms (jointly with Hawking radiation emission supression by a nearly-extremal black hole) help to supress the evaporation of a black hole?

Meanwhile, the radiation emitted by a black hole can be confined through various mechanisms like massive fields, magnetic fields, anti-de Sitter boundaries or nonlinear interactions (arxiv.org/abs/1501.06570). This confined radiation could return to the black hole. Applied to Hawking radation this would mean that the black hole would not lose its mass to this emission

Could these mechanisms (jointly with Hawking radiation emission supression by a nearly-extremal black hole) help to supress the evaporation of a black hole?