%0 Journal Article %T Hamiltonian dynamics of the Landau-Ginzburg model for the phase transition in (NH4)2BeF4 %A Ribeiro Filho A. %A Miranda Filho R. C. de %A Vasconcelos D. S. de %A Rocha J. F. M. %J Brazilian Journal of Physics %D 2000 %I Scientific Electronic Library Online %X We present a Hamiltonian treatment of the Landau-Ginzburg theory of phase transitions in the case of incommensurate ferroelectric systems like (NH4)2BeF4. This formulation has the advantage of treating the system as an example of a nonlinear dynamical system. %U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332000000300019