2004/12/08 by Claude Godrèche, C. Godrèche, E. Levine +2 · 1 citation
Mathematics · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Stochastic processes and statistical mechanics #Theoretical and Computational Physics #cond-mat.stat-mech
paper · pdf · doi:10.1088/0305-4470/38/29/l03
published as J. Phys. A 38 (2005) L523
arxiv created 2004/12/08 · openalex publication_date 2005/07/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Condensation transition in two-species driven systems in a ring geometry is studied in the case where the current–density relation of a domain of particles exhibits two degenerate maxima. It is found that the two maximal-current phases coexist both in the fluctuating domains of the fluid and in the condensate, when it exists. This has a profound effect on the steady-state properties of the model. In particular, phase separation becomes more favourable, as compared with the case of a single maximum in the current–density relation. Moreover, a selection mechanism imposes equal currents flowing out of the condensate, resulting in a neutral fluid even when the total numbers of particles of the two species are not equal. In this case, the particle imbalance shows up only in the condensate.