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- W3105360045 abstract "In the framework of non-relativistic quantum mechanics and with the help of the Greens functions formalism we study the behavior of weakly bound states as they approach the continuum threshold. Through estimating the Green's function for positive potentials we derive rigorously the upper bound on the wave function, which helps to control its falloff. In particular, we prove that for potentials whose repulsive part decays slower than $1/r^{2}$ the bound states approaching the threshold do not spread and eventually become bound states at the threshold. This means that such systems never reach supersizes, which would extend far beyond the effective range of attraction. The method presented here is applicable in the many--body case." @default.
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- W3105360045 date "2007-07-12" @default.
- W3105360045 modified "2023-10-18" @default.
- W3105360045 title "Rigorous conditions for the existence of bound states at the threshold in the two-particle case" @default.
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- W3105360045 doi "https://doi.org/10.1088/1751-8113/40/30/022" @default.
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