عنوان COSMOLOGICAL IMPLICATIONS OF A LORENTZ INVARIANCE VIOLATING O(2) MODEL عنوان مجله Romanian Journal of Physics نوع پژوهش مقاله چاپ شده کلیدواژهها Lorentz invariance violation, free energy, FRW models چکیده We derive the free energy of a Lorentz invariance violating (LIV) O(2) model, for which a non-vanishing commutator among it’s momenta is supposed. Then we investigate the possible implications of such a matter field on the time evolution of a flat FRW universe at low and high temperatures پژوهشگران اکبرجهان (نفر اول)