Abstract
We consider lattice gases where particles jump at random times constrained by hard-core exclusion (simple exclusion process with speed change). The conventional theory of critical slowing down predicts that close to a critical point the bulk diffusivity vanishes as the inverse compressibility. We confirm this claim by proving a strictly positive lower bound for the conductivity.
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Spohn, H., Yau, HT. Bulk diffusivity of lattice gases close to criticality. J Stat Phys 79, 231–241 (1995). https://doi.org/10.1007/BF02179388
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DOI: https://doi.org/10.1007/BF02179388