Symmetric teleparallel gravity has the same number of degrees of freedom as general relativity, confirmed via its Hamiltonian formulation after deriving generalized extrinsic geometry relations.
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Hybrid f(Q) cosmology with a 1/Q term is forced into background degeneracy with LambdaCDM but breaks it in the growth sector, yielding moderate preference over LambdaCDM when RSD data are included while leaving the background unchanged.
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Extrinsic geometry and Hamiltonian analysis of symmetric teleparallel gravity
Symmetric teleparallel gravity has the same number of degrees of freedom as general relativity, confirmed via its Hamiltonian formulation after deriving generalized extrinsic geometry relations.
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Beyond the Cosmological Constant: Breaking the Geometric Degeneracy of $ f(Q) $ cosmology via Redshift-Space Distortions
Hybrid f(Q) cosmology with a 1/Q term is forced into background degeneracy with LambdaCDM but breaks it in the growth sector, yielding moderate preference over LambdaCDM when RSD data are included while leaving the background unchanged.