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DY: Fachverband Dynamik und Statistische Physik

DY 48: Statistical Physics far from Thermal Equilibrium

DY 48.4: Vortrag

Donnerstag, 19. März 2020, 10:15–10:30, ZEU 147

Domain wall fluctuations between extremal current phases of driven lattice gases — •Marco Bosi, David Locher, and Philipp Maass — Fachbereich Physik, Osnabrück Universität, Germany

Driven lattice gases are systems where fundamental aspects of non-equilibrium physics can be conveniently studied. In addition they have many applications in biology and other fields. In bulk-driven open system coupled to particle reservoir, phase transitions occur, where, the bulk density in stationary states exhibits a singular behaviour upon varying the parameters of the system-reservoir couplings (analogous to first and second transitions known in equilibrium).Self-organized phases can appear with bulk densities equal to values where the bulk current is minimal or maximal[1][2].
In the presence of repulsive nearest-neighbour interactions degenerate maxima in the bulk current-density relation emerge[3], which allow for coexisting maximal current phases[4]. We report on the behaviour of the fluctuations of the domain walls separating those coexisting phases.
[1]J. Krug, Phys. Rev. Lett. 67, 1882 (1991).
[2]G. M. Schütz, in Phase Transitions and Critical Phenomena, edited by C. Domb and J. Lebowitz (Academic Press, London, 2001), Vol. 19, pp. 1-251.
[3]M. Dierl, M. Einax, and P. Maass, Phys. Rev. E 87, 062126 (2013).
[4]P. Maass, M. Dierl, and M. Wolff, in On Phase Transitions in Biased Diffusion of Interacting Particles (Springer International, Cham, 2018), Chap. 9, pp. 147-168.