Session J24: GSNP Student Presentation Session and Far From Equilibrium Systems

11:15 AM–2:03 PM, Tuesday, March 22, 2005
LACC Room: 411

Sponsoring Unit: GSNP
Chair: Mark Robbins, Johns Hopkins University

Abstract ID: BAPS.2005.MAR.J24.7

Abstract: J24.00007 : Persistence in Conserved Order Parameter Coarsening

12:27 PM–12:39 PM

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  Philip Marquis
  Benjamin Vollmayr-Lee
    (Bucknell University)

Persistence in conserved order parameter coarsening is studied via computer simulation of the Cahn-Hilliard equation. Persistence $P(t_1, t_2)$ is defined as the fraction of the system that has not been traversed by a domain wall between times $t_1$ and $t_2$. We measure persistence as a function of volume fraction and establish that it decays according to a power law $P \sim t_2^{-\theta}$ for all volume fractions studied. We find that the persistence exponent $\theta$ depends on the volume fraction. Our results are then compared with an exact calculation applicable in the dilute limit.

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