TRANSPORT OF A QUANTUM PARTICLE IN A DIMER UNDER THE INFLUENCE OF 2 CORRELATED DICHOTOMIC COLORED NOISES

The transport of a quantum particle in a dimer is investigated for the case in which the influence of phonons from different branches is mod eled by a dichotomic stochastic process with exponentially decaying co rrelations. For physical reasons, these processes might be correlated. An exact equation for the correlations between matrix elements of the density operator and both stochastic processes is constructed, and ei genvalues of the corresponding matrix are found numerically. Correlati ons between the noises reduce the range of incoherent transport. Vario us criteria for distinguishing between coherent and incoherent motion are also discussed.