Kinetics of phase-separation in the critical spherical model and local scale-invariance

Details Kinetics of phase-separation in the critical spherical model and local scale-invariance Kinetics of phase-separation in the critical spherical model and local scale-invariance

2006-11-26

arxiv.org/abs/cond-mat/0611652v2

J.Stat.Mech.0701:P01012,2007

Physics

Condensed Matter

Statistical Mechanics

Latex2e with IOP macros, 28 pp, 2 figures, final form

Scientific paper

10.1088/1742-5468/2007/01/P01012

The scaling forms of the space- and time-dependent two-time correlation and response functions are calculated for the kinetic spherical model with a conserved order-parameter and quenched to its critical point from a completely disordered initial state. The stochastic Langevin equation can be split into a noise part and into a deterministic part which has local scale-transformations with a dynamical exponent z=4 as a dynamical symmetry. An exact reduction formula allows to express any physical average in terms of averages calculable from the deterministic part alone. The exact spherical model results are shown to agree with these predictions of local scale-invariance. The results also include kinetic growth with mass conservation as described by the Mullins-Herring equation.

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