Identification of asymmetric current fluctuations in small systems

Loading...
Thumbnail Image
File version
Author(s)
Paneni, Carlo
Bernhardt, Debra
Rondoni, Lamberto
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)

C. Jagadish and G. Q.M. Lu

Date
2006
Size

469734 bytes

File type(s)

application/pdf

Location

Brisbane, Australia

License
Abstract

Theories of stochastic dynamics often used to model the behavior of mesoscopic and nanoscale systems predict temporal asymmetry in fluctuations of their properties when such systems are out of equilibrium. For example, in a system where a fluctuating current is produced, the way the current rises is different to the way in which it falls. Since mesoscopic systems can be considered as a collection of microscopic systems, we are led to ask: is this a fictitious effect of stochastic models, or does this asymmetry in the fluctuations even occur in more fundamental molecular level models, which are deterministic and reversible? Here we provide clear numerical evidence that asymmetric fluctuations do occur in nonequilibrium steady state molecular dynamics. In previous work, we observed fluctuations with asymmetric behavior in a microscopic system of particles undergoing Couette flow. We now extend our observations to a microscopic system of particles subject to color field, to verify that the presence of asymmetry in fluctuations holds more generally for reversible microscopic samples of matter out of equilibrium.

Journal Title
Conference Title

Proceedings of the 2006 International Conference on Nanoscience and Nanotechnology

Book Title
Edition
Volume
Issue
Thesis Type
Degree Program
School
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement

© 2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

Item Access Status
Note
Access the data
Related item(s)
Subject
Persistent link to this record
Citation