中国物理B ›› 2020, Vol. 29 ›› Issue (5): 50505-050505.doi: 10.1088/1674-1056/ab820e
• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇 下一篇
Bo Tian(田波), Ping Xia(夏萍), Li Liu(刘莉), Meng-Ran Wu(吴蒙然), Shu-Yong Guo(郭树勇)
Bo Tian(田波)1,2, Ping Xia(夏萍)1, Li Liu(刘莉)1, Meng-Ran Wu(吴蒙然)1, Shu-Yong Guo(郭树勇)1,2
摘要: We study two-lane totally asymmetric simple exclusion processes (TASEPs) with an intersection. Monte Carlo simulations show that only symmetric phases exist in the system. To verify the existence of asymmetric phases, we carry out a cluster mean-field analysis. Analytical results show that the densities of the two upstream segments of the intersection site are always equal, which indicates that the system is not in asymmetric phases. It demonstrates that the spontaneous symmetry breaking does not exist in the system. The density profiles and the boundaries of the symmetric phases are also investigated. We find that the cluster mean-field analysis shows better agreement with simulations than the simple mean-field analysis where the correlation of sites is ignored.
中图分类号: (Phase transitions: general studies)