2024-03-28T09:50:00Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/544042019-01-04T08:41:55Zcom_10261_132com_10261_8col_10261_385
Efficiency optimization in forced ratchets due to thermal fluctuations
Sumithra, K.
Sintes, Tomàs
The average current and efficiency of an overdamped Brownian particle, moving in an asymmetric potential and subject to an external driving force is studied by Langevin equation simulations. We found that there is a regime where the efficiency can be optimized at finite temperatures, contradicting the earlier findings (H. Kamegawa et al. Phys. Rev. Lett. 80 (1998) 5251). This, in fact, proves that thermal fluctuations contribute to the efficiency of the forced thermal ratchets. The conditions for achieving maximum flux and efficiency are different as claimed in previous investigations. We also discuss the influence of these quantities on the period of the external driving force. We argue that the theoretical results are valid only in the limiting case where the period of the external driving force is infinity. © 2001 Elsevier Science B.V.
2012-08-02T09:33:01Z
2012-08-02T09:33:01Z
2001
2012-08-02T09:33:02Z
artículo
Physica A: Statistical Mechanics and its Applications 297: 1- 12 (2001)
http://hdl.handle.net/10261/54404
10.1016/S0378-4371(01)00231-X
eng
closedAccess
Elsevier