Efficient algorithm for current spectral density calculation in   single-electron tunneling and hopping
  This write-up describes an efficient numerical method for the Monte Carlo calculation of the spectral density of current in the multi-junction single-electron devices and hopping structures. In future we plan to expand this write-up into a full-size paper. 
Viktor A. Sverdlov, Yusuf A. Kinkhabwala, and Alexander N. Korotkov