trailThe derivation of Hawking radiation depends on unknown trans-Planckian physics.
Black holes emit Hawking radiation.
Trans-Planckian mode origin· for
Hawking's original derivation traces outgoing modes back to frequencies far above the Planck scale.
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Robustness of the prediction· against
The predicted Hawking spectrum is insensitive to modifications of trans-Planckian dispersion relations.
Modified trans-Planckian dispersion relations in black-hole models preserve the thermal spectrum at the Hawking temperature.
The Hawking spectrum's insensitivity to modified dispersion holds only under conditions such as a free-falling vacuum and adiabatic evolution.
Alternative derivations of Hawking radiation avoid appealing to trans-Planckian frequencies.
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Independent theoretical derivations converge on the same black hole temperature.
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The derivation of Hawking radiation depends on unknown trans-Planckian physics.
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