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SUMMARY:Stefan Hollands (Leipzig University)
DTSTART:20210217T163000Z
DTEND:20210217T174500Z
DTSTAMP:20260423T024552Z
UID:HET/10
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/HET/10/">(In
 )determinism Inside Black Holes</a>\nby Stefan Hollands (Leipzig Universit
 y) as part of Purdue HET\n\n\nAbstract\nIn classical General Relativity\, 
 the values of fields on spacetime are\nuniquely determined by their initia
 l values within its 'domain of\ndependence'. However\, it may occur that t
 he\nspacetime under consideration extends beyond this domain\, and\nfields
 \, therefore\, are not entirely determined by their initial data.  \nSuch 
 a naive\nfailure of determinism occurs inside all physically relevant blac
 k holes.\n\nThe boundary of the region determined by the initial data is\n
 called the 'Cauchy horizon'. Penrose has proposed ('strong cosmic  \ncenso
 rship conjecture')\nthat the Cauchy horizon is actually unstable in the se
 nse that the  \nslightest perturbation caused\nby remnant fields convert i
 t to a final singularity. Whether or not  \nthis is the case --\nand thus 
 whether there is a real problem with determinism -- has been  \ndebated re
 cently.\n\nIn this talk I ask whether quantum effects will come to the res
 cue of  \nstrong cosmic censorship.\n
LOCATION:https://researchseminars.org/talk/HET/10/
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