Microscopic realization of cross-correlated noise processes

Abstract

We present a microscopic theory of cross-correlated noise processes, starting from a Hamiltonian system-reservoir description. In the proposed model, the system is nonlinearly coupled to a reservoir composed of harmonic oscillators, which in turn is driven by an external fluctuating force. We show that the resultant Langevin equation derived from the composite system (system+reservoir +external modulation) contains the essential features of cross-correlated noise processes. (C) 2010 American Institute of Physics. [doi:10.1063/1.3454590]