Complex systems quantum diffusion

Fluorescence correlation spectroscopy can be used to measure the binding dynamics of host-guest complexes when the fluorescence quantum yields for the free and bound hosts are different. Analysis of fluorescence correlation spectra depends on the profile for the excitation pulse, which impacts the shape of the emission profile and mechanistic assumptions are made with respect to the diffusion of the various species in solution.58 For each chemical system different assumptions are made. 

Third, diffusion is often an integral part of the dynamics in real systems under non-UHV and even under UHV conditions. These involve nonzero coverages of multiple adsorbates, nonequilibrium surface structures of adsorbates, and other complications. It is clearly important to understand the simplest case of single-atom diffusion on a surface since this will underlie the more complex situations. A number of important conclusions have been learned from studies of atomic diffusion (1) lattice motion substantially increases the quantum mechanical diffusion constant as shown in Fig. 44 by... 

Hindc, R.. 7. 1998, Structural control of Ar-HF complexes using dc electric fields a diffusion quantum Monte Carlo study . Chem. Phys. Lett. 283, 125-130.. lungwirth, P. and R,. B. Gerber 1995, Quantum dynamics of large polyatomic systems using a classically based separable potential method . J. Chem. Phy.s. 102. 6046 6056. 

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