Effects of two different time delays on transport properties of coupled ratchets
School of Physical Science and Technology, Suzhou University - Suzhou, Jiangsu 215006, PRC
Accepted: 3 August 2010
The transport properties of the coupled Brownian ratchets driven by an unbiased time-periodic force are investigated when two different characteristic time delays are included in the system. It is found that the average velocity of the coupled Brownian motors decreases monotonically as the delay time in the feedback terms increases. The delay time in the coupling terms induces oscillations in the average velocity with a period approximately equal to the driving period. Both values of the peaks and the valleys in the average velocity decrease as delay time in the coupling terms increases.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 05.45.Pq – Numerical simulations of chaotic systems / 05.60.Cd – Classical transport
© EPLA, 2010