Transport in nonequilibrium systems with position-dependent mobility
We propose a transport mechanism for overdamped diffusing particles. The mechanism is based on a position-dependent mobility and on breaking detailed balance. Using a two-state model, we show that the transport direction is given by the phase shift between mobility and potential or mobility and transition rate. No symmetry breaking potential as employed in ratchet-type transport models is needed.
Luchsinger
RH
Department of Physics and Astronomy, University of British Columbia, Vancouver British Columbia, Canada V6T 1Z1.