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Squeezed-state approach to the two-site two-electron Peierls-Hubbard system

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Zeitschrift für Physik B Condensed Matter

Abstract

The squeezed-state approach is used to construct the trial ground state wavefunction of the two-site two-electron Peierls-Hubbard system and then the ground state energy and the charge transfer are calculated by means of the variational principle. The comparison with the exact and approximate results of previous authors shows that the approach gives a rather good description of the continuous variation of the ground state energy and the charge transfer as functions of the electron-phonon couplingS and the electronic correlationU for the undistorted situation as well as for the strong mixing between the undistorted and distorted states.

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Author notes

  1. H. Zheng

    Present address: Department of Applied Physics, Shanghai Jiao Tong University, 200030, Shanghai, People's Republic of China

Authors and Affiliations

  1. CCAST (World Lab.), P.O. Box 8730, 100080, Beijing, People's Republic of China

    H. Zheng

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  1. H. Zheng
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Zheng, H. Squeezed-state approach to the two-site two-electron Peierls-Hubbard system. Z. Physik B - Condensed Matter 82, 363–367 (1991). https://doi.org/10.1007/BF01357180

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  • DOI: https://doi.org/10.1007/BF01357180

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