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arXiv · 2006.16230

Constraint Algebra in Bigravity

Vladimir O. Soloviev
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Abstract

The constraint algebra is derived in the second order tetrad Hamiltonian formalism of the bigravity. This is done by a straightforward calculation without involving any insights, implicit functions, and Dirac brackets. The tetrad approach is the only way to present the bigravity action as a linear functional of lapses and shifts, and the Hassan-Rosen transform (characterized as "a complicated redefinition of the shift variable" according to the authors) appears here not as an ansatz but as fixing of a Lagrange multiplier. A comparison of this approach with the other ones is provided.

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BibTeXRIS

Vladimir O. Soloviev. 2020-10-17. Constraint Algebra in Bigravity. https://doi.org/10.1088/1361-6382%2Fabc523

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