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Novel couplings between nonmetricity and matter (1901.00805v1)
Published 3 Jan 2019 in gr-qc, astro-ph.CO, and hep-th
Abstract: We present a novel theory of gravity, namely, an extension of symmetric teleparallel gravity. This is done by introducing a new class of theories where the nonmetricity $Q$ is coupled nonminimally to the matter Lagrangian. This nonminimal coupling entails the nonconservation of the energy-momentum tensor, and consequently the appearance of an extra force. We also present several cosmological applications.
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