Tagged-particle dynamics in a hard-sphere system : mode-coupling theory analysis


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VOIGTMANN, Thomas, Antonio M. PUERTAS, Matthias FUCHS, 2004. Tagged-particle dynamics in a hard-sphere system : mode-coupling theory analysis. In: Physical Review E. 70, 61506

@article{Voigtmann2004Tagge-9419, title={Tagged-particle dynamics in a hard-sphere system : mode-coupling theory analysis}, year={2004}, doi={10.1103/PhysRevE.70.061506}, volume={70}, journal={Physical Review E}, author={Voigtmann, Thomas and Puertas, Antonio M. and Fuchs, Matthias}, note={Article Number: 61506} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/9419"> <dc:creator>Voigtmann, Thomas</dc:creator> <dcterms:rights rdf:resource="https://creativecommons.org/licenses/by-nc-nd/2.0/legalcode"/> <dcterms:bibliographicCitation>First publ. in: Physical Review E 70 (2004), Article 061506</dcterms:bibliographicCitation> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:56:21Z</dc:date> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:56:21Z</dcterms:available> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/9419"/> <dc:contributor>Fuchs, Matthias</dc:contributor> <dc:creator>Fuchs, Matthias</dc:creator> <dcterms:title>Tagged-particle dynamics in a hard-sphere system : mode-coupling theory analysis</dcterms:title> <dc:creator>Puertas, Antonio M.</dc:creator> <dc:language>eng</dc:language> <dc:contributor>Voigtmann, Thomas</dc:contributor> <dcterms:abstract xml:lang="eng">The predictions of the mode-coupling theory of the glass transition (MCT) for the tagged-particle densitycorrelation functions and the mean-squared displacement curves are compared quantitatively and in detail to results from Newtonian- and Brownian-dynamics simulations of a polydisperse quasi-hard-sphere system close to the glass transition. After correcting for a 17% error in the dynamical length scale and for a smaller error in the transition density, good agreement is found over a wide range of wave numbers and up to five orders of magnitude in time. Deviations are found at the highest densities studied, and for small wave vectors and the mean-squared displacement. Possible error sources not related to MCT are discussed in detail, thereby identifying more clearly the issues arising from the MCT approximation itself. The range of applicability of MCT for the different types of short-time dynamics is established through asymptotic analyses of the relaxation curves, examining the wave-number and density-dependent characteristic parameters. Approximations made in the description of the equilibrium static structure are shown to have a remarkable effect on the predicted numerical value for the glass-transition density. Effects of small polydispersity are also investigated, and shown to be negligible.</dcterms:abstract> <dc:rights>deposit-license</dc:rights> <dcterms:issued>2004</dcterms:issued> <dc:format>application/pdf</dc:format> <dc:contributor>Puertas, Antonio M.</dc:contributor> </rdf:Description> </rdf:RDF>

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