Noise-induced current reversal in a stochastically driven dissipative tight-binding model

The cooperative effects induced by external random dichotomic and d.c. drivings are studied for charge drift and diffusion in a one-dimensional dissipative tight-binding model. For a strongly correlated dichotomic field the effect of large diffusion acceleration is demonstrated, Additionally, it is shown that the averaged current direction can be inverted by applying a strongly correlated electric field (noise-induced negative conductivity). (C) 1998:Elsevier Science B.V.