Seminar talk, 16 December 2020: Difference between revisions
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Revision as of 18:33, 16 December 2020
Speaker: Igor Khavkine
Title: Killing compatibility complex on Kerr spacetime
Abstract:
The Killing operator on a Lorentzian spacetime plays an important role in General Relativity (GR): it generates infinitesimal gauge symmetries of the theory. Gauge symmetry invariants play the role of physical observables. In PDE language, this translates to the following: the components of a compatibility operator for generate all local observables for linearized GR on the background . In arXiv:1910.08756 we have explicitly constructed such a compatibility operator (indeed, a full compatibility complex) on the astrophysically interesting Kerr spacetime of a rotating black hole. I will motivate and explain our approach and describe the complexity of the construction.
![{\displaystyle K_{ab}[v]=\nabla _{a}v_{b}+\nabla _{b}v_{a}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/cd00c3dcefd727bc689cf91a243e3e2542b44f2d)
Language: English
Video