Condensed Matter Physics, 1996, No 8, p. 37-50, English
Here we propose a method of construction of the second order approximation of the ground state energy for a class of model Hamiltonians with linear type interaction with respect to Bose operators in the strong coupling case. For the application of the above-mentioned method we have considered polaron model and proposed a set of nonlinear differential equations for the ground state energy calculation in the strong coupling case. We have considered also the radially symmetrical case.Comments: Refs. 16, Tabs. 0, Figs. 0.
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