The current transport characteristics of a delayed feedback ratchet in a double-well potential

On the basis of the double-well potential which can be calculated theoretically and implemented experimentally, the influence of the time delay, number of particles and asymmetric parameter of the potential on the performance of a delayed feedback ratchet is investigated. The center-of-mass velocity of Brownian particles, average effective diffusion coefficient and Pe number are calculated. It is expounded that the parameters are affected by not only the time delay and number of particles but also by the asymmetric parameter of the double-well ratchet potential. It is very interesting to find that the current transport reversal may be obtained by varying the number of particles of the system. It is expected that the results obtained here may be observed in some physical and biological systems because the double-well ratchet potential is realizable experimentally.