Fluctuations, correlations, and stability in disordered athermal packings

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• Dr Roshan Kumar Maharana
• Wednesday 26 November 2025, 14:30-15:30
• Unilever Lecture Theatre, Yusuf Hamied Department of Chemistry.

If you have a question about this talk, please contact Lisa Masters.

In this talk, I will discuss theoretical as well as numerical results related to correlations, fluctuations, and stability in athermal systems. I will focus on jammed near-crystalline packings composed of frictionless particles interacting through short-ranged Harmonic as well as long-ranged Lennard-Jones interactions in both two and three dimensions. I will describe exact results related to position and force fluctuations as well as correlations in local stresses induced by microscopic disorder in such near-crystalline systems. I will also characterize the stability of these systems through their vibrational density of states, as well as the distribution of first contact breaking events when subjected to strain. Finally, I will present a universal characterization of stress correlations in such systems, spanning an entire range of disorder from crystalline to fully amorphous packings.

This talk is part of the Theory - Chemistry Research Interest Group series.

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