%0 Journal Article %J Physical Review E %D 2014 %T Extended order parameter and conjugate field for the dynamic phase transition in a Ginzburg-Landau mean-field model in an oscillating field %A Daniel T. Robb %A Aaron Ostrander %X We present numerical evidence for an extended order parameter and conjugate field for the dynamic phase transition in a Ginzburg-Landau mean-field model driven by an oscillating field. The order parameter, previously taken to be the time-averaged magnetization, comprises the deviations of the Fourier components of the magnetization from their values at the critical period. The conjugate field, previously taken to be the time-averaged magnetic field, comprises the even Fourier components of the field. The scaling exponents β and δ associated with the extended order parameter and conjugate field are shown numerically to be consistent with their values in the equilibrium mean-field model. %B Physical Review E %V 89 %P 022114 %8 2014/02/12 %G eng %U http://link.aps.org/doi/10.1103/PhysRevE.89.022114 %R 10.1103/PhysRevE.89.022114