Classification of primary constraints of quadratic non-metricity theories of gravity

Abstract

We perform the ADM decomposition of a five-parameter family of quadratic non-metricity theories and study their conjugate momenta. After systematically identifying all possible conditions which can be imposed on the parameters such that different sets of primary constraints arise, we find that the five-parametric theory space can be compartmentalized into nine different sectors, based on the presence or absence of primary constraints. This classification allows to dismiss certain classes of theories as unphysical and invites further investigations into the remaining sectors, which may contain phenomenologically interesting modifications of General Relativity.

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Correspondence to Fabio D’Ambrosio.

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ArXiv ePrint: 2007.05064

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D’Ambrosio, F., Heisenberg, L. Classification of primary constraints of quadratic non-metricity theories of gravity. J. High Energ. Phys. 2021, 170 (2021). https://doi.org/10.1007/JHEP02(2021)170

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Keywords

  • Classical Theories of Gravity
  • Cosmology of Theories beyond the SM