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Localized energy density of gravitational waves

Published on:

14 May 2024

Primary Category:

General Relativity and Quantum Cosmology

Paper Authors:

Antoine Rignon-Bret,

Simone Speziale

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Key Details

New corner term in the symplectic structure at null infinity

Resulting charges have a monotonic 'hard' flux

Allow defining a localized energy density of gravitational waves

Satisfy covariance and other standard criteria

Could have applications for second law and soft theorems

AI generated summary

Localized energy density of gravitational waves

This paper proposes a new set of charges at null infinity that allow defining a localized energy density of gravitational waves. This is achieved by improving the corner of the symplectic structure to obtain charges with a 'hard' flux. They satisfy standard criteria like covariance and vanish in non-radiative spacetimes. The localized energy density provides an operational way to measure the energy absorbed locally from a gravitational wave flux.

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