Initial state dependence of phase behaviors in dense active system

There are rich emergent phase behaviors in non-equilibrium active systems. Flocking and clustering two representative dynamic phases. The relationship between these phases is still unclear. In the paper, we numerically investigate evolution of flocking a system consisting self-propelled particles with reorientation. We consider interplay under different initial states, observe an unstable domain order parameters diagrams due to states even absence explicit attraction. This point from previous finding that angular fluctuations lead earlier breakdown collective motion emergence new bi-stable regime aligned [R.Grossmann et al, New J. Phys.073033,14 (2012)]. particular, find existence diversity paths arising states. By increasing (decreasing) degree ordering, state can be shifted more ordered (disordered clustering) state. These results enlighten us pave way manipulate motions system.