Coherent dissipative ensembles

Rather than deriving the general formulas related to Coleman s extreme configuration [107], we will derive the statistical coherent dissipative ensemble in a much more simple way, see also Ref. [95] for more details. To exemplify the generality of our formulation, we will thus consider M = N/2 bosons (or N fermions) described by set of n > N/2 localized pair functions or geminals h =. .. 1%, obtained from appropriate pairing of one-particle... 

A critical point, in our view, is that performing experiments with short pulses allows one to observe the behavior of individual molecules by forcing the whole ensemble to travel together (this is literally what coherence means) until dissipation sets in. But when the process is initiated with incoherent light, individual molecules behave in the same way as they did in the short-pulse experiment, except that now there is a stochastic distribution of... 

The mixed quantum classical description of EET can be achieved in using Eq. (49) together with the electronic ground-state classical path version of Eq. (50). As already indicated this approach is valid for any ratio between the excitonic coupling and the exciton vibrational interaction. If an ensemble average has been taken appropriately we may also expect the manifestation of electronic excitation energy dissipation and coherence decay, however, always in the limit of an infinite temperature approach. 

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