Condensed Matter Physics, 1996, No 8, p. 37-50, English
<br><A HREF="https://doi.org/10.5488/CMP.8.37"> DOI:10.5488/CMP.8.37</A>

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<B>Title: </B>SECOND ORDER APPROXIMATION FOR OPTICAL POLARONS IN THE STRONG COUPLING CASE<BR>
<B>Authors: </B>N.N.Bogolubov, Jr. (V.A.Steklov Mathematical Institute, Russian Academy of
Sciences, GSP-1, 117966 Moscow, Russia)

<p>
<blockquote>
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.
</blockquote>
<B>Comments: </B>Refs. 16, Tabs. 0, Figs. 0.<BR>

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