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Friday 11 February 2011, 13:00-14:00
Localizing the Energy and Momentum of Linear Gravity
- đ¤ Speaker: Luke Butcher, Kavli Institute for Cosmology
- đ Date & Time: Friday 11 February 2011, 13:00 - 14:00
- đ Venue: Pavilion B Potter Room (B1.19)
Abstract
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 between matter and gravity. The gauge ambiguity of the description is removed, mostly as a natural consequence of the derivation, and partly by considering the energy-momentum transferred onto an infinitesimal detector. I will also show that this gravitational energy-density is always positive, and never flows faster than light.
Series This talk is part of the DAMTP Friday GR Seminar series.
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