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SUMMARY:What can holographic entanglement entropy teach us about general r
 elativity? - Headrick\, M (Brandeis University)
DTSTART:20130919T130000Z
DTEND:20130919T134500Z
UID:TALK47246@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:The covariant holographic entanglement entropy formula propose
 d by Hubeny\, Rangamani\, and Takayanagi asserts that the entropy of a bou
 ndary region is given by the area of a certain extremal spacelike surface 
 in the bulk. Unlike for more familiar objects like timelike geodesics and 
 horizons\, there are not yet many theorems about extremal spacelike surfac
 es in the general-relativity literature. However\, based on considerations
  from quantum information theory\, the HRT formula implies or suggests a l
 arge number of interesting general statements about such surfaces and thei
 r relation to the spacetime's global causal structure. The effort to prove
  these novel conjectures has spurred significant recent developments in GR
 . I will explain the conjectures\, their motivation\, and the progress tha
 t has been made toward proving them.\n
LOCATION:Seminar Room 1\, Newton Institute
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