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Updated: Jun 8, 2026

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Analysis of dynamic heterogeneity in a glass former from the spatial correlations of mobility
Smarajit Karmakar1, Chandan Dasgupta, Srikanth Sastry
1Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore, 560012, India. smarajit@physics.iisc.ernet.in
Abstract:
The growth of characteristic length scales associated with dynamic heterogeneity in glass-forming liquids is investigated in an extensive computational study of a four-point, time-dependent structure factor defined from spatial correlations of mobility, for a model liquid for system sizes extending up to 351 232 particles, in constant-energy and constant-temperature ensembles. Our estimates for dynamic correlation lengths and susceptibilities are consistent with previous results from finite size scaling. We find scaling exponents that are inconsistent with predictions from inhomogeneous mode coupling theory and a recent simulation confirmation of these predictions.
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