We consider the island formula for the entropy of subsets of the Hawking radiation in the adiabatic limit where the black hole evaporation is very slow. We find a simple concrete 'on-shell' formula for the generalized entropy which involves the image of the island out in the stream of radiation, the 'island in the stream'. The resulting recipe for the entropy allows us to calculate the quantum information properties of the radiation and verify various constraints including the Araki-Lieb inequality and strong subadditivity.
Hollowood, T., Prem Kumar, S., Legramandi, A., Talwar, N. (2021). Islands in the Stream of Hawking Radiation. JOURNAL OF HIGH ENERGY PHYSICS, 2021(11) [10.1007/JHEP11(2021)067].
Islands in the Stream of Hawking Radiation
Andrea Legramandi;
2021
Abstract
We consider the island formula for the entropy of subsets of the Hawking radiation in the adiabatic limit where the black hole evaporation is very slow. We find a simple concrete 'on-shell' formula for the generalized entropy which involves the image of the island out in the stream of radiation, the 'island in the stream'. The resulting recipe for the entropy allows us to calculate the quantum information properties of the radiation and verify various constraints including the Araki-Lieb inequality and strong subadditivity.
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