Power Spectra of the Total Occupancy in the Totally Asymmetric Simple Exclusion Process

Details Power Spectra of the Total Occupancy in the Totally Asymmetric Simple Exclusion Process Power Spectra of the Total Occupancy in the Totally Asymmetric Simple Exclusion Process

2007-06-05

arxiv.org/abs/0706.0571v1

Phys. Rev. Lett. 99, 020601 (2007)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.99.020601

As a solvable and broadly applicable model system, the totally asymmetric exclusion process enjoys iconic status in the theory of non-equilibrium phase transitions. Here, we focus on the time dependence of the total number of particles on a 1-dimensional open lattice, and its power spectrum. Using both Monte Carlo simulations and analytic methods, we explore its behavior in different characteristic regimes. In the maximal current phase and on the coexistence line (between high/low density phases), the power spectrum displays algebraic decay, with exponents -1.62 and -2.00, respectively. Deep within the high/low density phases, we find pronounced \emph{oscillations}, which damp into power laws. This behavior can be understood in terms of driven biased diffusion with conserved noise in the bulk.

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