Extended order parameter and conjugate field for the dynamic phase transition in a Ginzburg-Landau mean-field model in an oscillating field.

Phys Rev E Stat Nonlin Soft Matter Phys

University of Maryland, College Park, Maryland 20742, USA and Department of Physics, Astronomy and Geology, Berry College, Mount Berry, Georgia 30149, USA.

Published: February 2014

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.

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http://dx.doi.org/10.1103/PhysRevE.89.022114DOI Listing

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