Analysis finds degrees of freedom in modified gravity theory on Minkowski background, suggesting new insights into gravitational models.
Symmetric teleparallel gravity (STG) can be regarded as a modified gravity theory that lacks diffeomorphism symmetries, which complicates the calculation of its degrees of freedom. In this study, we analyze the linear perturbations of general STG models on a Minkowski background, considering both scenarios with and without scalar couplings. Furthermore, we provide lower bounds for the number of degrees of freedom associated with each model.
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Dehao Zhao (2025) studied this question.
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