Finite Dimensional Vestige of Spinodal Criticality above the Dynamical Glass Transition.

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Finite dimensional signatures of spinodal criticality are notoriously difficult to come by. The dynamical transition of glass-forming liquids, first described by mode-coupling theory, is a spinodal instability preempted by thermally activated processes that also limit how close the instability can be approached. We combine numerical tools to directly observe vestiges of the spinodal criticality in finite dimensional glass formers. We use the swap Monte Carlo algorithm to efficiently thermalize configurations beyond the mode-coupling crossover, and analyze their dynamics using a scheme to screen out activated processes, in spatial dimensions ranging from d=3 to d=10. We observe a strong softening of the mean-field square-root singularity in d=3 that is progressively restored as d increases above d=8, in surprisingly good agreement with perturbation theory.





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Berthier, Ludovic, Patrick Charbonneau and Joyjit Kundu (2020). Finite Dimensional Vestige of Spinodal Criticality above the Dynamical Glass Transition. Physical review letters, 125(10). p. 108001. 10.1103/physrevlett.125.108001 Retrieved from

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Patrick Charbonneau

Professor of Chemistry

Professor Charbonneau studies soft matter. His work combines theory and simulation to understand the glass problem, protein crystallization, microphase formation, and colloidal assembly in external fields.

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