| Conţinutul numărului revistei |
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 SM ISO690:2012KLIMIN, Serghei, DEVREESE, Josef T.. Feynman's path-integral polaron treatment approached using time-ordered operator calculus. In: Solid State Communications, 2011, vol. 151, pp. 144-147. ISSN 0038-1098. DOI: https://doi.org/10.1016/j.ssc.2010.11.003 |
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  Solid State Communications |
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| Volumul 151 / 2011 / ISSN 0038-1098 /ISSNe 1879-2766 | ||||||
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| DOI:https://doi.org/10.1016/j.ssc.2010.11.003 | ||||||
| Pag. 144-147 | ||||||
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The Feynman all-coupling variational approach for the polaron is re-formulated and extended using the Hamiltonian formalism with time-ordered operator calculus. Special attention is devoted to the excited polaron states. The energy levels and the inverse lifetimes of the excited polaron states are, for the first time, explicitly derived within this all-coupling approach. Remarkable agreement of the obtained transition energies with the peak positions of the polaron optical conductivity calculated using diagrammatic quantum Monte Carlo is obtained. |
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| Cuvinte-cheie A. High-Tc superconductors, A. Semiconductors, D. Electronphonon interactions, D. Polarons |
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