@article{Weysser2010Struc-9356,
  year={2010},
  doi={10.1103/PhysRevE.82.011504},
  title={Structural relaxation of polydisperse hard spheres : comparison of the mode-coupling theory to a Langevin dynamics simulation},
  volume={82},
  journal={Physical review E},
  author={Weysser, Fabian and Puertas, Antonio Manuel and Fuchs, Matthias and Voigtmann, Thomas},
  note={Article Number: 011504}
}

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    <dc:creator>Puertas, Antonio Manuel</dc:creator>
    <dc:creator>Fuchs, Matthias</dc:creator>
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    <dcterms:bibliographicCitation>First publ. in: Physical review E 82 (2010), 011504</dcterms:bibliographicCitation>
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    <dc:contributor>Voigtmann, Thomas</dc:contributor>
    <dcterms:abstract xml:lang="eng">We analyze the slow glassy structural relaxation as measured through collective and tagged-particle density correlation functions obtained from Brownian dynamics simulations for a polydisperse system of quasi-hard spheres in the framework of the mode-coupling theory (MCT) of the glass transition. Asymptotic analyses show good agreement for the collective dynamics when polydispersity effects are taken into account in a multicomponent calculation, but qualitative disagreement at small q when the system is treated as effectively monodisperse. The origin of the different small-q behavior is attributed to the interplay between interdiffusion processes and structural relaxation. Numerical solutions of the MCT equations are obtained taking properly binned partial static structure factors from the simulations as input. Accounting for a shift in the critical density, the collective density correlation functions are well described by the theory at all densities investigated in the simulations, with quantitative agreement best around the maxima of the static structure factor and worst around its minima. A parameter-free comparison of the tagged-particle dynamics however reveals large quantitative errors for small wave numbers that are connected to the well-known decoupling of self-diffusion from structural relaxation and to dynamical heterogeneities. While deviations from MCT behavior are clearly seen in the tagged-particle quantities for densities close to and on the liquid side of the MCT glass transition, no such deviations are seen in the collective dynamics.</dcterms:abstract>
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    <dc:contributor>Fuchs, Matthias</dc:contributor>
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    <dc:contributor>Puertas, Antonio Manuel</dc:contributor>
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    <dcterms:title>Structural relaxation of polydisperse hard spheres : comparison of the mode-coupling theory to a Langevin dynamics simulation</dcterms:title>
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