توصیف نیمه کلاسیک مگنت‌های غیر هایزنبرگی همسانگرد برای اسپین 2/3=S و دینامیک برانگیختگی‌های چهارقطبی خطی

 In this paper, a system with spin S=3/2 with general isotropic nearest neighbor exchange within a mean field approximation possess is discnssed. We derive equations describing non-Heisenberg isotropic model using coherent states of SU(4) group in real parameters and then obtain dispersion equations of spin wave of dipole and quadrupole branches for a small linear excitation from the ground state.