Dynamics of a spin nematic with $S = 3/2$ on a triangular lattice

The behavior of the spectra of elementary excitations of a spin nematic with a magnetic ion spin of 3/2 on a triangular lattice in collinear spin states is studied. It is shown that the lattice geometry does not change the dispersion laws in collinear phases. The study of the dependence of the excitation energy on the value of the wave vector showed a weak dependence on the direction of the wave vector.