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Title:
Properties of asymptotic BMS charges
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Abstract:
We discuss three different aspects of asymptotic BMS charges: (i) We describe operational procedures for how some of the charges can be measured from local measurements of the spacetime geometry by asymptotic observers, for the special case of stationary regions and transitions between stationary regions. (ii) We compute charges associated with the extended BMS algebra of Barnich and Troessaert and describe how they are related to the two types of gravitational wave memory, ordinary memory and null memory. (iii) We estimate the net fluctuations in the BMS charges produced by Hawking radiation from an evaporating black hole, over the lifetime of the black hole. These fluctuations make the usual arguments for the information loss paradox less sharp, but are insufficient to resolve the paradox.
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