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Asymptotic Symmetries in the Gauge Fixing Approach and the BMS Group

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arxiv 1910.08367 v2 pith:R7KQ4XMR submitted 2019-10-16 hep-th gr-qc

Romain Ruzziconi This is my paper · ORCID
classification hep-thgr-qc
keywords asymptoticgaugegeneralapproachasymptoticallydifferentfixinggroup
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abstract

These notes are an introduction to asymptotic symmetries in gauge theories, with a focus on general relativity in four dimensions. We explain how to impose consistent sets of boundary conditions in the gauge fixing approach and how to derive the asymptotic symmetry parameters. The different procedures to obtain the associated charges are presented. As an illustration of these general concepts, the examples of four-dimensional general relativity in asymptotically (locally) (A)dS$_4$ and asymptotically flat spacetimes are covered. This enables us to discuss the different extensions of the Bondi-Metzner-Sachs-van der Burg (BMS) group and their relevance for holography, soft gravitons theorems, memory effects, and black hole information paradox. These notes are based on lectures given at the XV Modave Summer School in Mathematical Physics.

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Cited by 4 Pith papers

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