Tests of mode-coupling theory in two-dimensions

Weysser, Fabian; Hajnal, David

Tests of mode-coupling theory in two-dimensions

Dateien

Weysser_137777.pdfGröße: 1.39 MBDownloads: 359

Datum

2011

Autor:innen

Weysser, Fabian

Hajnal, David

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review E. 2011, 83(4). ISSN 1539-3755. Available under: doi: 10.1103/PhysRevE.83.041503

Zusammenfassung

We analyze the glassy dynamics of binary mixtures of hard disks in two dimensions. Predictions of the mode-coupling theory (MCT) are tested with extensive Brownian dynamics simulations.Measuring the collective particle density correlation functions in the vicinity of the glass transition, we verify four predictedmixing effects. For instance, for large size disparities, adding a small amount of small particles at a fixed packing fraction leads to a speedup in the long-time dynamics, while for small size disparities it leads to a slowing-down. Qualitative features of the nonergodicity parameters and the β relaxation, which both depend in a nontrivial way on the mixing ratio, are found in the simulated correlators. Studying one system in detail, we are able to determine its ideal MCT glass transition point as ϕc = 0.7948 and test MCT predictions quantitatively.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

WEYSSER, Fabian, David HAJNAL, 2011. Tests of mode-coupling theory in two-dimensions. In: Physical Review E. 2011, 83(4). ISSN 1539-3755. Available under: doi: 10.1103/PhysRevE.83.041503

BibTex

@article{Weysser2011Tests-13777,
  year={2011},
  doi={10.1103/PhysRevE.83.041503},
  title={Tests of mode-coupling theory in two-dimensions},
  number={4},
  volume={83},
  issn={1539-3755},
  journal={Physical Review E},
  author={Weysser, Fabian and Hajnal, David}
}

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