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Soliton model for collective proton transfer in extended realistic hydrogen-bonded systems

The discretized version of the collective proton transfer in extended one-dimensional hydrogen-bonded systems with the Lippincott-Schroeder potential is studied. A discrete quasi-kink is compared with its continuum approximation ‘image’. The Peierls-Nabarro activation energy of diffusion of collective proton defect is estimated. The concept of local proton potentials is introduced on the background of the kink-carrier collective variable.