Shot noise suppression at one-dimensional hopping

We have carried out a preliminary analysis of shot noise at hopping, focusing on uniform one-dimensional ~1D! arrays of sites separated by N tunnel barriers. The results show that at low temperatures the low-frequency density of the shot noise varies from 1/N to 1 of the Schottky value, depending on the geometry, electron density, and Coulomb interaction strength. An interesting feature is v dependence of the current spectral density at intermediate frequencies, which reflects self-similarity of the fluctuations at different size scales.