Multiple field modified gravity and localized energy in teleparallel framework

This work is devoted to drive an energy-momentum complex (due to matter and fields including gravity) in the realm of modified teleparallel gravity. For this purpose, the Lagrangian of teleparallel theory is extended to a more general form by replacing the torsion scalar with an arbitrary function of it. Furthermore, considering cosmological perturbations, we explicitly calculate energy distribution associated with the Friedmann-Lemaitre-Robertson-Walker spacetime. Finally, we discuss also the coupling case between matter and gravity in the context of teleparallel modified theory.