Post-Newtonian limit of generalized scalar-teleparallel theories of gravity
Hohmann M. Ualikhanova U.
15 February 2024American Physical Society
Physical Review D
2024#109Issue 4
We propose a general class of scalar-teleparallel theories, which are based on a scalar field which is coupled to a flat connection with torsion and nonmetricity, and study its post-Newtonian limit using the parametrized post-Newtonian formalism. We find that among this class there are theories whose post-Newtonian limit fully agrees with general relativity; for others only the parameters β and γ deviate from their general relativity values β=γ=1, while all other parameters remain the same, thus preserving total momentum conservation, local Lorentz invariance and local position invariance; finally, we also find theories whose post-Newtonian limit is pathological. Our main result is a full classification of the proposed theories into these different cases. We apply our findings to a number of simpler classes of theories and show that for these a subset of the aforementioned cases can be found.
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Laboratory of Theoretical Physics, Institute of Physics, University of Tartu, W. Ostwaldi 1, Tartu, 50411, Estonia
Department of General and Theoretical Physics, L. N. Gumilyov Eurasian National University, Satpayev Str. 2, Astana, 010008, Kazakhstan
Laboratory of Theoretical Physics
Department of General and Theoretical Physics
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