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STAG Research Centre

String Theory seminar - Andrea Legramandi Seminar

16 February 2022
Online seminar

For more information regarding this seminar, please email Ben Withers at .

Event details

Title: Islands in The Stream of Hawking radiation

Abstract: We consider the island formula for the entropy of an arbitrary subset of the Hawking radiation in the adiabatic limit, including the effect of a grey-body factor. 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 quantum information properties of the radiation are discussed together with the entanglement monogamy problem. The grey-body factor allows us to analyse the role of irreversibility in the evaporation. In particular, we show that irreversibility leads to multiple saddles to dominate the entropy, and we will match this result with a generalization of Page's theorem that involves a nested temporal sequence of unitary averages.




Speaker information

Andrea Legramandi, Swansea.

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