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Statistical properties of entropy-consuming fluctuations in jammed states of laponite suspensions: Fluctuation relations and generalized Gumbel distribution

Majumdar, Sayantan and Sood, AK (2012) Statistical properties of entropy-consuming fluctuations in jammed states of laponite suspensions: Fluctuation relations and generalized Gumbel distribution. In: Physical Review E, 85 (4, Par).

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Official URL: http://pre.aps.org/abstract/PRE/v85/i4/e041404

Abstract

We report a universal large deviation behavior of spatially averaged global injected power just before the rejuvenation of the jammed state formed by an aging suspension of laponite clay under an applied stress. The probability distribution function (PDF) of these entropy consuming strongly non-Gaussian fluctuations follow an universal large deviation functional form described by the generalized Gumbel (GG) distribution like many other equilibrium and nonequilibrium systems with high degree of correlations but do not obey the Gallavotti-Cohen steady-state fluctuation relation (SSFR). However, far from the unjamming transition (for smaller applied stresses) SSFR is satisfied for both Gaussian as well as non-Gaussian PDF. The observed slow variation of the mean shear rate with system size supports a recent theoretical prediction for observing GG distribution.

Item Type: Journal Article
Additional Information: Copyright of this article is belongs to The American Physical Society.
Keywords: UNIVERSAL FLUCTUATIONS;AQUEOUS DISPERSIONS;CORRELATED SYSTEMS;PHASE-DIAGRAM;RHEOLOGY;TURBULENCE;SCATTERING; VISCOSITY;BEHAVIOR;THEOREM
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 22 Aug 2012 04:52
Last Modified: 22 Aug 2012 04:52
URI: http://eprints.iisc.ernet.in/id/eprint/44455

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