Finite-size effects on the dynamics of the zero-range process

Gupta, Shamik ; Barma, Mustansir ; Majumdar, Satya N. (2007) Finite-size effects on the dynamics of the zero-range process Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 76 (6). 060101_1-06010_4. ISSN 1539-3755

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We study finite-size effects on the dynamics of a one-dimensional zero-range process which shows a phase transition from a low-density disordered phase to a high-density condensed phase. The current fluctuations in the steady state show striking differences in the two phases. In the disordered phase, the variance of the integrated current shows damped oscillations in time due to the motion of fluctuations around the ring as a dissipating kinematic wave. In the condensed phase, this wave cannot propagate through the condensate, and the dynamics is dominated by the long-time relocation of the condensate from site to site.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:79591
Deposited On:27 Jan 2012 13:02
Last Modified:27 Jan 2012 13:02

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