Filippis, G. ; Cataudella, V. ; Perroni, C. ; Ramaglia, V. ; Bercioux, D.
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| Item type: | Article |
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| Journal or Publication Title: | European Physical Journal B |
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| Volume: | 36 |
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| Page Range: | p. 65 |
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| Date: | 2003 |
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| Institutions: | UNSPECIFIED |
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| Identification Number: | | Value | Type |
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| cond-mat/0309309 | arXiv ID |
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| Related URLs: | |
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| Dewey Decimal Classification: | 500 Science > 530 Physics |
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| Status: | Published |
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| Refereed: | Yes, this version has been refereed |
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| Created at the University of Regensburg: | Yes |
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| Item ID: | 1539 |
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Abstract
Following the ideas behind the Feynman approach, a variational wave function is proposed for the Fröhlich model. It is shown that it provides, for any value of the electron-phonon coupling constant, an estimate of the polaron ground state energy better than the Feynman method based on path integrals. The mean number of phonons, the average electronic kinetic and interaction energies, the ground ...
Abstract
Following the ideas behind the Feynman approach, a variational wave function is proposed for the Fröhlich model. It is shown that it provides, for any value of the electron-phonon coupling constant, an estimate of the polaron ground state energy better than the Feynman method based on path integrals. The mean number of phonons, the average electronic kinetic and interaction energies, the ground state spectral weight and the electron-lattice correlation function are calculated and successfully compared with the best available results.
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