Time-delayed feedback control of a flashing ratchet
نویسندگان
چکیده
منابع مشابه
Feedback control in a collective flashing ratchet.
An ensemble of Brownian particles in a feedback controlled flashing ratchet is studied. The ratchet potential is switched on and off depending on the position of the particles, with the aim of maximizing the current. We study in detail a protocol which maximizes the instant velocity of the center of mass of the ensemble at any time. This protocol is optimal for one particle and performs better ...
متن کاملThreshold feedback control for a collective flashing ratchet: threshold dependence.
We study the threshold control protocol for a collective flashing ratchet. In particular, we analyze the dependence of the current on the values of the thresholds. We have found analytical expressions for the small threshold dependence both for the few and for the many particle cases. For few particles the current is a decreasing function of the thresholds, thus, the maximum current is reached ...
متن کاملEffect of time delay on feedback control of a flashing ratchet
It was recently shown that the use of feedback control can improve the performance of a flashing ratchet. We investigate the effect of a time delay in the implementation of feedback control in a closed-loop collective flashing ratchet, using Langevin dynamics simulations. Surprisingly, for a large ensemble, a well-chosen delay time improves the ratchet performance by allowing the system to sync...
متن کاملThe flashing ratchet: long time behavior and dynamical systems interpretation
The flashing ratchet is a model for certain types of molecular motors as well as a convenient model problem in the more general context of diffusion mediated transport. In this paper we show that it can be derived using a minimum energy dissipation principle for transport in a viscous environment. We then study the long time behavior of the flashing ratchet model. By entropy methods, we prove t...
متن کاملTime-Delayed Quantum Feedback Control.
A theory of time-delayed coherent quantum feedback is developed. More specifically, we consider a quantum system coupled to a bosonic reservoir creating a unidirectional feedback loop. It is shown that the dynamics can be mapped onto a fictitious series of cascaded quantum systems, where the system is driven by past versions of itself. The derivation of this model relies on a tensor network rep...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review E
سال: 2007
ISSN: 1539-3755,1550-2376
DOI: 10.1103/physreve.76.061113