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Physik - Open Access LMU - Teil 01/02 Podcast
Traffic jams induced by rare switching events in two-lane transport

Traffic jams induced by rare switching events in two-lane transport

Physik - Open Access LMU - Teil 01/02 vor 19 Jahren

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We investigate a model for driven exclusion processes where
internal states are assigned to the particles. The latter account
for diverse situations, ranging from spin states in spintronics to
parallel lanes in intracellular or vehicular traffic. Introducing a
coupling between the internal states by allowing particles to
switch from one to another induces an intriguing polarization
phenomenon. In a mesoscopic scaling, a rich stationary regime for
the density profiles is discovered, with localized domain walls in
the density profile of one of the internal states being feasible.
We derive the shape of the density profiles as well as resulting
phase diagrams analytically by a mean-field approximation and a
continuum limit. Continuous as well as discontinuous lines of phase
transition emerge, their intersections induce multi-critical
behaviour.