Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2007-09-25
J. Stat. Mech. (2007) P11015
Physics
Condensed Matter
Disordered Systems and Neural Networks
20 pages, 11 figures
Scientific paper
10.1088/1742-5468/2007/11/P11015
We consider one-dimensional asymmetric exclusion processes with a simple attractive interaction, where the distance between consecutive particles is not allowed to exceed a certain limit and investigate the consequences of this coupling on the transport properties in the presence of random-force type disorder by means of a phenomenological random trap picture. In the phase-separated steady state of the model defined on a finite ring, the properties of the density profile are studied and the exponent governing the decay of the current with the system size in the biased phase is derived. In case all consecutive particles are coupled with each other and form a closed string, the current is found to be enhanced compared to the model without coupling, while if groups of consecutive particles form finite strings, the current is reduced. The motion of a semi-infinite string entering an initially empty lattice is also studied. Here, the diffusion of the head of the string is found to be anomalous, and two phases can be distinguished, which are characterised by different functional dependences of the diffusion exponent on the bias. The obtained results are checked by numerical simulation.
No associations
LandOfFree
Anomalous transport in disordered exclusion processes with coupled particles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Anomalous transport in disordered exclusion processes with coupled particles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anomalous transport in disordered exclusion processes with coupled particles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-626407