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Phase Separation Driven by a Fluctuating Two-Dimensional Self-Affine Potential Field

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Abstract

We study phase separation in a system of hard-core particles driven by a fluctuating two-dimensional self-affine potential landscape which evolves through Kardar–Parisi–Zhang (KPZ) dynamics. We find that particles tend to cluster together on a length scale which grows in time. The final phase-separated steady state is characterized by an unusual cusp singularity in the scaled correlation function and a broad distribution for the order parameter. Unlike the one-dimensional case studied earlier, the cluster-size distribution is asymmetric between particles and holes, reflecting the broken reflection symmetry of the KPZ dynamics, and has a contribution from an infinite cluster in addition to a power law part. A study of the surface in terms of coarse-grained depth variables helps understand many of these features.

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Manoj, G., Barma, M. Phase Separation Driven by a Fluctuating Two-Dimensional Self-Affine Potential Field. Journal of Statistical Physics 110, 1305–1316 (2003). https://doi.org/10.1023/A:1022113414376

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  • DOI: https://doi.org/10.1023/A:1022113414376

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