Abstract
We consider the Schrödinger equation with a Hamiltonian given by a second-order difference operator with nonconstant growing coefficients, on the half one-dimensional lattice. This operator appeared first naturally in the construction and dynamics of noncommutative solitons in the context of noncommutative field theory. We prove pointwise in time decay estimates with the decay rate \({t^{-1}\log^{-2}t}\), which is optimal with the chosen weights and appears to be so generally. We use a novel technique involving generating functions of orthogonal polynomials to achieve this estimate.
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Communicated by Claude Alain Pillet.
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Krueger, A.J., Soffer, A. Dynamics of Noncommutative Solitons I: Spectral Theory and Dispersive Estimates. Ann. Henri Poincaré 17, 1181–1208 (2016). https://doi.org/10.1007/s00023-015-0431-z
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DOI: https://doi.org/10.1007/s00023-015-0431-z