White-noise-induced transport in periodic structures - Comment

In the paper by J. Luczka et al. (Europhys. Lett., 31 (1995) 431), the authors reported by rigorous calculation that an additive Poissonian white shot noise can induce a macroscopic current of a dissipative particle in a periodic potential -even in the absence of spatial asymmetry of the potential. We argue that their central result can easily be attributed to the spatially broken symmetry of a probability distribution of the additive noise, unlike the similar result caused by chaotic noise which has a symmetric probability distribution (J. Phys. Soc. Jpn., 63 (1994)2014).