This result exhibits that the cooperative effects caused by asymmetric ratchet potential, external flashing force and additive colored noise set a Brownian particle in the directed stepping motion.

• 结果表明：非对称锯齿势，外部含时闪烁力及加性色噪声协调与联合作用，可使布朗粒子做梯跳或锯齿运动。