Cosmological Inflation in f(Q, T) Gravity
  We study the cosmological inflation within the context of f(Q, T) gravity,
wherein Q is the nonmetricity scalar and T is the trace of the matter
energy-momentum tensor. By choosing a linear combination of Q and T, we first
analyze the realization of an inflationary scenario driven via the geometrical
effects of f(Q, T) gravity and then, we obtain the modified slow-roll
parameters, the scalar and the tensor spectral indices, and the
tensor-to-scalar ratio for the proposed model. In addition, by choosing a few
appropriate inflationary potentials and by applying the slow-roll
approximations, we calculate these inflationary observables in the presence of
an inflaton scalar field. The results indicate that by properly restricting the
free parameters, the proposed model provides appropriate predictions that are
consistent with the observational data obtained from the Planck 2018.
