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VOLUME 64 (1996) | ISSUE 3 | PAGE 140
Integrable Chain of Elections coupled with squeezed phonons
The exact wave function for a one-dimensional chain of electrons coupled with squeezed phonons is obtained. The ground state energy and the gap in the electron spectrum are calculated. It is shown that there exists an optimal phonon number nph у о for the ground state of the system. The results are generalised for a system of correlated electrons. PACS: 63.20.Kr, 63.22.+m, 71.10.-w