Discrete Spectrum of a Model Operator Related to Three-Particle Discrete Schrödinger Operators

Details Discrete Spectrum of a Model Operator Related to Three-Particle Discrete Schrödinger Operators Discrete Spectrum of a Model Operator Related to Three-Particle Discrete Schrödinger Operators

2009-04-14

arxiv.org/abs/0904.2078v2

Mathematics

Functional Analysis

11 pages

Scientific paper

A model operator $H_\mu,$ $\mu>0$ associated to a system of three particles on the three-dimensional lattice $ \mathbb{Z}^3$ that interact via nonlocal pair potentials is considered. We study the case where the parameter function $w$ has a special form with the non degenerate minimum at the $n, n>1$ points of the six-dimensional torus $\mathbb{T}^6.$ If the associated Friedrichs model has a zero energy resonance, then we prove that the operator $H_\mu$ has infinitely many negative eigenvalues accumulating at zero and we obtain an asymptotics for the number of eigenvalues of $H_\mu$ lying below $z,$ $z<0$ as $z\to -0.$

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