Degrees of freedom and Hamiltonian formalism for f(T) gravity
Abstract
The existence of an extra degree of freedom (d.o.f.) in f(T) gravity has been recently proved by means of the Dirac formalism for constrained Hamiltonian systems. We will show a toy model displaying the essential feature of f(T) gravity, which is the pseudoinvariance of T under a local symmetry, to understand the nature of the extra d.o.f.
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