A canonical formalism of f(T)-type gravity in terms of Lie derivatives

Abstract

A canonical formalism of f(R)-type gravity is proposed, resolving the problem in the formalism of Buchbinder and Lyakhovich(BL). The new coordinates corresponding to the time derivatives of the metric are taken to be its Lie derivatives which is the same as in BL. The momenta canonically conjugate to them and Hamiltonian density are defined similarly to the formalism of Ostrogradski. It is shown that our method surely resolves the problem of BL.

11 pages, no figure

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• Higher-order theories of gravity: diagnosis, extraction and reformulation via non-metric extra degrees of freedom
• Third quantization of $f(R)$-type gravity II - General $f(R)$ case -
• On the canonical formalism of $f(R)$-type gravity using Lie derivatives