Page states what unitarity requires of the radiation

Assembled from 24 blocks · 1 evidence · 16 related

1. Story
2. Don Page pointed out that if evaporation is unitary, the entanglement entropy of the emitted radiation must rise while the hole is large, turn over at roughly the halfway point, and return to zero when the hole is gone. Hawking's calculation produces a curve that only rises. The Page curve turned a philosophical disagreement into a quantitative target: any proposed resolution has to reproduce a specific shape, and for twenty-six years none did from within gravity itself.
3. Knowledge
4. Black hole entropy
5. The black hole information paradox
6. Page states what unitarity requires of the radiation
7. Connections
8. The black hole information paradox
9. Black hole entropy
10. Hawking radiation
11. The no-hair result
12. Hawking argues that information is destroyed
13. Page states what unitarity requires of the radiation
14. Hawking concedes the information bet
15. The Page curve is reproduced from within semiclassical gravity
16. The event horizon
17. Jacob Bekenstein
18. Hawking radiation
19. Bekenstein assigns entropy to a black hole
20. Hawking shows that black holes radiate
21. Page states what unitarity requires of the radiation
22. The Page curve is reproduced from within semiclassical gravity
23. Evidence
24. States the entanglement-entropy behaviour that unitary evaporation requires, now known as the Page curve. V55 VERIFICATION BASIS: not consulted in session; no research tool was available. Volume and page are from recall and must be checked. The 2019-2020 island and replica-wormhole papers that reproduce this curve are deliberately NOT cited anywhere in this pack, because their authors and venues could not be confirmed.