Berlin 2024 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 58: Complex Fluids and Soft Matter (joint session DY/CPP)
DY 58.6: Vortrag
Freitag, 22. März 2024, 11:00–11:15, BH-N 243
Towards a standard model of liquid matter — Alessio Zaccone1,2 and •Vinay Vaibhav1 — 1University of Milan, Department of Physics, 20133 Milan, Italy — 2Institute of Theoretical Physics, University of Göttingen, Germany
Our understanding of liquid matter made a leap in 20th century physics thanks to the successful mathematical and numerical development of pair correlation functions, which gave unprecedented insights into the structure of liquids. The same is however not true for the dynamical, mechanical and thermodynamic properties of liquids. The most striking example is the inability of celebrated theories to explain the specific heat of liquids or the propagation of acoustic waves in liquids as they are observed experimentally or in simulations. This of course includes the emergence of rigidity as a function of frequency of mechanical oscillation or as a function of confinement, and the Maxwell interpolation between viscous (Newton) and elastic (Hooke) limits, which has remained largely an empirical assumption in many theories of liquids and supercooled liquids, from generalized hydrodynamics to mode-coupling theory. In my talk I will show that these open issues can be understood mechanistically, and in comparison with experiments, by combining advances from different conceptual frameworks: i) the Instantaneous Normal Modes theory of liquid dynamics, and iii) the nonaffine response theory of liquids and glasses [1-3]. [1] A. Zaccone, "Theory of Disordered Solids", Springer, 2023, [2] A. Zaccone, Phys. Rev. E 108, 044101 (2023), [3] K. Trachenko and A. Zaccone, PNAS 117 (33) 19653-19655 (2020).
Keywords: liquids; glasses and supercooled liquids; viscoelasticity; rheology of complex fluids