# Branes, Islands, and Massive Gravitons

- Institution: CERN
- Department: Conferences & Workshops
- Speaker: Andreas Karch
- Year: 2021
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3014570)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Recent developments have led to a breakthrough in our understanding of the evaporation of black holes in very special systems: gravity in a box, coupled to an external bath. To what extend these considerations apply to generic black holes is a point of debate. In this talk we will demonstrate that one of the main ingredients in these calculations, the appearance of entanglement islands, generally leads to a clash with basic ideas of entanglement wedge reconstruction and Gauss' law. This clash is resolved in the existing examples by one very special feature of gravity in a box, coupled to a bath: the graviton is massive in these systems. This crucial importance of the graviton mass in the existing constructions makes generalizations of current thinking to realistic black holes challenging..

0:00:00 Slide 1

0:04:49 Slide 2

0:09:38 Slide 3

0:14:27 Slide 4

0:19:16 Slide 5

0:24:05 Slide 6

0:28:54 Slide 7

0:33:43 Slide 8

0:38:32 Slide 9

0:43:21 Slide 10

0:48:10 Slide 11

## Lectures

1. [Branes, Islands, and Massive Gravitons](https://invisiblenetwork.ai/learn/cern/3014570/e1065cf9a630), 49 min (CERN's player)