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SUMMARY:Gravitation from Entanglement - Mark Van Raamsdonk (University of 
 British Columbia)
DTSTART:20140131T130000Z
DTEND:20140131T140000Z
UID:TALK50480@talks.cam.ac.uk
CONTACT:Helvi Witek
DESCRIPTION:Entanglement entropy obeys a 'first law'\, an exact quantum ge
 neralization of the ordinary first law of thermodynamics. In any CFT with 
 a semiclassical holographic dual\, this first law has an interpretation in
  the dual gravitational theory as a constraint on the spacetimes dual to C
 FT states. For small perturbations around the CFT vacuum state\, we show t
 hat the set of such constraints for all ball-shaped spatial regions in the
  CFT is exactly equivalent to the requirement that the dual geometry satis
 fy the gravitational equations of motion\, linearized about pure AdS.\nFor
  theories with entanglement entropy computed by the Ryu-Takayanagi formula
  S=A/(4G)\, we obtain the linearized Einstein equations. For theories in w
 hich the vacuum entanglement entropy for a ball is computed by more genera
 l Wald functionals\, we obtain the linearized equations for the associated
  higher-curvature theories.
LOCATION:Pavilion B Potter Room (B1.19)
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