Tuning non-reciprocal pattern

Reciprocity is a fundamental principle guiding the behavior of the majority of physical systems. However, when these systems are out of equilibrium, a lack of reciprocity becomes more common. In recent years, researchers have extensively explored non-reciprocity across various systems. Nevertheless, the vast majority of tend to converge towards a single specific state. Here, we demonstrate the potential of multiple states in non-reciprocity active metamaterials, both theoretically and experimentally. By manipulating the initial states, we have the capability to specifically target a desired final state. Furthermore, when the system is initiated from random noise, countless mixed states, combinations of the basic states over time or space, can also emerge. We foresee that exploring multiple non-reciprocal states will pave the way for a deeper understanding of active matter and living matter, and open avenues in the fields of wave propagations, versatile soft robots and metamaterials.