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- W1993553641 abstract "Abstract A physically meaningful oscillator is introduced, which is harmonic for small displacements from equilibrium but subjected to a restoring force, which is logarithmically soft for large displacements from equilibrium, and it is shown that the transport of a quantum quasiparticle in interaction with such an oscillator can be described under certain conditions with the help of a generalized discrete nonlinear Schrodinger equation with exponential nonlinearity. Effects of saturation of nonlinearity and destruction of self-trapping with increasing nonlinearity, reported earlier for rotational polarons, are shown to arise in this exponentially nonlinear system too, and a comparison of the two systems is carried out. Interpreting the nonlinear equation as a classical discrete self-trapping equation, the quantum version of the equation is obtained and solved exactly." @default.
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- W1993553641 date "1996-02-01" @default.
- W1993553641 modified "2023-09-26" @default.
- W1993553641 title "Exponential nonlinearity and saturation in quantum nonlinear dimers" @default.
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- W1993553641 doi "https://doi.org/10.1016/0167-2789(95)00237-5" @default.
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