Abstract
We present and discuss derivations of nonlinear 1-particle equations from linear N-particle Schrödinger equations with pair interaction in the time dependent case. We regard both the “classical” limit of vanishing Planck constant ħ → 0 which leads to Vlasov type equations and the “weak coupling” limit 1/N → 0 which leads to nonlinear 1 particle equations.
We use an approach to weak coupling limits where the so-called “finite Schrödinger hierarchy” and the limiting “(infinite) Schrödinger hierarchy” play a central role. Convergence of solutions of the first to solutions of the second is established using “physically relevant” estimates (L 2 and energy conservation) under very general assumptions on the interaction potential, including in particular the Coulomb potential. The goal of this work is to give an overview of the existing results, including some minor improvements, and clearly state the open problems.
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Bardos, C., Golse, F., Gottlieb, A., Mauser, N.J. (2004). On the Derivation of Nonlinear Schrödinger and Vlasov Equations. In: Abdallah, N.B., et al. Dispersive Transport Equations and Multiscale Models. The IMA Volumes in Mathematics and its Applications, vol 136. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-8935-2_1
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DOI: https://doi.org/10.1007/978-1-4419-8935-2_1
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