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SUMMARY:Holography without Strings - Donald Marolf (UCSB)
DTSTART:20131025T120000Z
DTEND:20131025T130000Z
UID:TALK47881@talks.cam.ac.uk
CONTACT:Helvi Witek
DESCRIPTION:A defining feature of holographic dualities is that\, along wi
 th the bulk equations of motion\, boundary correlators at any given time $
 t$ determine those of observables deep in the bulk.  We argue that this pr
 operty emerges from the bulk gravitational Gauss law together with bulk qu
 antum entanglement as embodied in the Reeh-Schlieder theorem.  Stringy bul
 k degrees of freedom are not required and play little role even when they 
 exist.   As an example we study a toy model whose matter sector is a free 
 scalar field.  The energy density $\\rho$ sources what we call a pseudo-Ne
 wtonian potential $\\Phi$ through Poisson's equation on each constant time
  surface\, but there is no back-reaction of $\\Phi$ on the matter.  We sho
 w the Hamiltonian to be essentially self-adjoint on the domain generated f
 rom the vacuum by acting with boundary observables localized in an arbitra
 rily small neighborhood of the chosen time $t$.  Since the Gauss law repre
 sents the Hamiltonian as a boundary term\, the model is holographic in the
  sense stated above.
LOCATION:Pavilion B Potter Room (B1.19)
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