QUANTUM AND TEMPERATURE EFFECTS ON DAVYDOV SOLITON DYNAMICS .3. INTERCHAIN COUPLING

We show numerically that Scott's suggestion to use revised parameter values in order to simulate interchain coupling effects on Davydov soliton dynamics with one-chain simulations is correct also for excitations within the \D2] ansatz state, for which his analytical derivation does not hold. However, in the case of the \D1] state we find that the equations of motion for the symmetric mode reduce exactly to the equations for one chain without any renormalization of parameters. Further, we present numerical simulations for three coupled chains including temperature within different ansatz states and for one chain using Scott's revised parameters. We found that Davydov solitons should exist in three-chain systems at physiological temperature for reasonable parameter values.