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PRODID:-//Columba Systems Ltd//NONSGML CPNG/SpringViewer/ICal Output/3.3-
 M3//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20240910T142139Z
DTSTART:20210210T150000Z
DTEND:20210210T163000Z
SUMMARY:Black holes\, information and wormholes
UID:{http://www.columbasystems.com/customers/uom/gpp/eventid/}moa-m0wisov
 s-v6p8p
DESCRIPTION:In the 1970s\, Hawking showed that black holes\, like any fin
 ite-temperature system\, radiate energy and so eventually evaporate away
  entirely. However\, his calculations showed something very weird: unlik
 e any other physical system\, the radiation seemed to contain no informa
 tion about the initial state of the black hole. Instead the information 
 that fell into the black hole was simply lost forever. This contradictio
 n between Hawking's calculations and the ordinary rules of quantum mecha
 nics has been a driving force behind much of the research in quantum gra
 vity over the ensuing decades. Finally\, in the last couple of years\, w
 e have begun to understand where Hawking's calculation went wrong\, and 
 to derive precise predictions\, consistent with unitary quantum mechanic
 s\, for the information content of Hawking radiation. However\, the new 
 calculations\, which involve weird spacetime topologies called 'spacetim
 e wormholes'\, lead to as many new questions as answers.
STATUS:TENTATIVE
TRANSP:TRANSPARENT
CLASS:PUBLIC
LOCATION:Zoom
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