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NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2016, 7 (5), P. 880–887

Spectral properties of a two–particle hamiltonian on a d-dimensional lattice

M. I. Muminov – Universiti Teknologi Malaysia (UTM), 81310 Skudai, Johor Bahru, Malaysia; mmuminov@mail.ru
A. M. Khurramov – Department of Mechaniical and Mathematics, Samarkand State University, Uzbekistan; xurramov@mail.ru

A system of two arbitrary quantum particles moving on d-dimensional lattice interacting via some attractive potential is considered. The number of eigenvalues of the family h(k) is studied depending on the interaction energy of particles and the total quasi-momentum k∈Td (Td – d-dimensional torus). Depending on the interaction energy, the conditions for h(0) that has simple or multifold virtual level at 0 are found.

Keywords: two-particle hamiltonian, virtual level, multiplicity of virtual level.

DOI 10.17586/2220-8054-2016-7-5-880-887

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