High-dimensional percolation criticality and hints of mean-field-like caging of the random Lorentz gas.

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2021-08

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Abstract

The random Lorentz gas (RLG) is a minimal model for transport in disordered media. Despite the broad relevance of the model, theoretical grasp over its properties remains weak. For instance, the scaling with dimension d of its localization transition at the void percolation threshold is not well controlled analytically nor computationally. A recent study [Biroli et al., Phys. Rev. E 103, L030104 (2021)2470-004510.1103/PhysRevE.103.L030104] of the caging behavior of the RLG motivated by the mean-field theory of glasses has uncovered physical inconsistencies in that scaling that heighten the need for guidance. Here we first extend analytical expectations for asymptotic high-d bounds on the void percolation threshold and then computationally evaluate both the threshold and its criticality in various d. In high-d systems, we observe that the standard percolation physics is complemented by a dynamical slowdown of the tracer dynamics reminiscent of mean-field caging. A simple modification of the RLG is found to bring the interplay between percolation and mean-field-like caging down to d=3.

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10.1103/physreve.104.024137

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Charbonneau, Benoit, Patrick Charbonneau, Yi Hu and Zhen Yang (2021). High-dimensional percolation criticality and hints of mean-field-like caging of the random Lorentz gas. Physical review. E, 104(2-1). p. 024137. 10.1103/physreve.104.024137 Retrieved from https://hdl.handle.net/10161/24980.

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Charbonneau

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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