Basu, Abhik ; Ramaswamy, Sriram (2007) Perspectives on the mode-coupling approximation for the dynamics of interacting Brownian particles Journal of Statistical Mechanics: Theory and Experiment, 2007 (11). P11003_1-P11003_20. ISSN 1742-5468
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Official URL: http://iopscience.iop.org/1742-5468/2007/11/P11003
Related URL: http://dx.doi.org/10.1088/1742-5468/2007/11/P11003
Abstract
We analyse the field theory for the dissipative dynamics of interacting inertialess particles, using a dynamic density-wave model (Bagchi 1987Physica A 145 273), including thermal fluctuations (Dean 1996 J. Phys. A: Math. Gen. 29 L619; Fuchizaki and Kawasaki 1999 Physica A 266 400). The symmetries of the problem lead to Ward identities relating vertex functions of different orders. We show that in this theory self-consistent one-loop expansions must involve three-point functions in addition to two-point functions. We obtain correlation and response functions in a one-loop self-consistent approximation similar to, but distinct from, standard mode-coupling theories, and discuss the role of vertex renormalizations. We present a resolution of the conflict between the one-loop approximation and the fluctuation-dissipation theorem, compare our results with those of other approaches, and obtain a modified equation for the non-ergodicity parameter for this model.
Item Type: | Article |
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Source: | Copyright of this article belongs to Institute of Physics. |
ID Code: | 39881 |
Deposited On: | 19 May 2011 05:41 |
Last Modified: | 19 May 2011 05:41 |
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