Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2007-10-03
Phys. Rev. E 76, 060101(R), 2007
Physics
Condensed Matter
Statistical Mechanics
5 pages, 5 figures, version published in Phys. Rev. E Rapid Communications
Scientific paper
10.1103/PhysRevE.76.060101
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.
Barma Mustansir
Gupta Shamik
Majumdar Satya N.
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