Abstract

We consider a model Schrodinger operator Hμ associated with a system of three particles on the threedimensional lattice ℤ3 with a functional parameter of special form. We prove that if the corresponding Friedrichs model has a zero-energy resonance, then the operator Hμ has infinitely many negative eigenvalues accumulating at zero (the Efimov effect). We obtain the asymptotic expression for the number of eigenvalues of Hμ below z as z → −0.

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