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Persistent Anti-Correlations in Brownian Dynamics Simulations of Dense Colloidal Suspensions Revealed by Noise Suppression.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mandal, Suvendu Schrack, Lukas Löwen, Hartmut Sperl, M. Franosch, Thomas |
| Copyright Year | 2019 |
| Abstract | Transport properties of a hard-sphere colloidal fluid are investigated by Brownian dynamics simulations. We implement a novel algorithm for the time-dependent velocity-autocorrelation function (VACF) essentially eliminating the noise of the bare random motion. The measured VACF reveals persistent anti-correlations manifested by a negative algebraic power-law tail t^{-5/2} at all densities. At small packing fractions the simulations fully agree with the analytic low-density prediction, yet the amplitude of the tail becomes dramatically suppressed as the packing fraction is increased. The mode-coupling theory of the glass transition provides a qualitative explanation for the strong variation in terms of the static compressibility as well as the slowing down of the structural relaxation. |
| Starting Page | 168001 |
| Ending Page | 168001 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| DOI | 10.1103/PhysRevLett.123.168001 |
| Alternate Webpage(s) | https://www2.thphy.uni-duesseldorf.de/~hlowen/doc/op/op0413.pdf |
| Alternate Webpage(s) | https://arxiv.org/pdf/2004.10738v1.pdf |
| PubMed reference number | 31702351 |
| Alternate Webpage(s) | https://doi.org/10.1103/PhysRevLett.123.168001 |
| Journal | Medline |
| Volume Number | 123 |
| Issue Number | 16 |
| Journal | Physical review letters |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
