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Physik - Open Access LMU - Teil 01/02 Podcast
Dynamic correlation functions and Boltzmann-Langevin approach for driven one-dimensional lattice gas

Dynamic correlation functions and Boltzmann-Langevin approach for driven one-dimensional lattice gas

Physik - Open Access LMU - Teil 01/02 vor 20 Jahren

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We study the dynamics of the totally asymmetric exclusion process
with open boundaries by phenomenological theories complemented by
extensive Monte Carlo simulations. Upon combining domain wall
theory with a kinetic approach known as Boltzmann-Langevin theory
we are able to give a complete qualitative picture of the dynamics
in the low- and high-density regimes and at the corresponding phase
boundary. At the coexistence line between high- and low-density
phases we observe a time scale separation between local density
fluctuations and collective domain wall motion, which are well
accounted for by the Boltzmann-Langevin and domain wall theory,
respectively. We present Monte Carlo data for the correlation
functions and power spectra in the full parameter range of the
model.