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Novel couplings between nonmetricity and matter

T. Harko, T. S. Koivisto, G. J. Olmo, F. S. N. Lobo, D. Rubiera-Garcia

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.

Modified gravity; nonmetricity; cosmology

The Fifteenth Marcel Grossmann Meeting
Elia S Battistelli, Robert T Jantzen, Remo Ruffini

World Scientific Publishing Co. Pte. Ltd., Page 410
2022 August

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Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia