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SUMMARY:Localizing the Energy and Momentum of Linear Gravity - Luke Butche
 r\, Kavli Institute for Cosmology
DTSTART:20110211T130000Z
DTEND:20110211T140000Z
UID:TALK28522@talks.cam.ac.uk
CONTACT:David Kubiznak
DESCRIPTION:Although there is little doubt that gravitational waves exist 
 and carry energy as they propagate\, it has been notoriously difficult to 
 explain where in spacetime this energy resides. I will motivate and derive
  a new framework for localising the energy and momentum of the linearised 
 gravitational field\, based on the local exchange of energy-momentum betwe
 en matter and\ngravity. The gauge ambiguity of the description is removed\
 , mostly as a natural consequence of the derivation\, and partly by consid
 ering the\nenergy-momentum transferred onto an infinitesimal detector. I w
 ill also show that this gravitational energy-density is always positive\, 
 and never flows\nfaster than light.
LOCATION:Pavilion B Potter Room (B1.19)
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