Summary
Results of extensive computer simulations performed in liquid water are reported in order to clarify the main features of dynamical density correlations in this system. Puzzling aspects, such as the anomalous sound wave propagation at finite wave vectors, are related to the peculiar structural aspects of this hydrogen-bonded liquid. Additional features (such as the evolution of the relevant memory functions at increasing wave vectors and the emergency of a second mode in the longitudinal current spectra) are also discussed in some detail.
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Balucani, U., Ruocco, G., Sampoli, M. et al. Longitudinal collective modes in liquid water. Il Nuovo Cimento D 16, 817–824 (1994). https://doi.org/10.1007/BF02456729
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DOI: https://doi.org/10.1007/BF02456729