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SUMMARY:The Destruction of Black Holes - Adam Brown (Stanford)
DTSTART:20150508T120000Z
DTEND:20150508T130000Z
UID:TALK59101@talks.cam.ac.uk
CONTACT:Benson Way
DESCRIPTION:There are a number of important thought experiments that invol
 ve raising and lowering boxes full of radiation in the vicinity of black h
 ole horizons. My talk will look at the limitations placed on these thought
  experiments by the null energy condition\, which imposes a fundamental bo
 und on the tensile-strength-to-weight ratio of the materials involved\, ma
 kes it impossible to build a box near the horizon that is wider than a sin
 gle wavelength of the Hawking quanta and puts a severe constraint on the o
 peration of 'space elevators' near black holes. In particular\, proposals 
 for 'mining' black holes by lowering boxes near the horizon\, collecting s
 ome Hawking radiation and dragging it out to infinity cannot proceed nearl
 y as rapidly as has previously been claimed.\nreference: arXiv:1207.3342.
LOCATION:Pavilion B Potter Room (B1.19)
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