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Застосування методiв квантової теорiї поля до розробки трансляцiйно-iнварiантної теорiї полярона та бiполярона

Застосування методiв квантової теорiї поля до розробки трансляцiйно-iнварiантної теорiї полярона та бiполярона

The polaron and bipolaron energy functionals obtained in the framework of quantum field theory have been studied. Exact analytical expressions for the effective functionals are derived in terms of the two-parametrical trial function for a polaron and the three-parametrical one for a bipolaron. Varia...

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Bibliographic Details
Main Author: Kashirina, N. I.
Format: Article
Language:English
Ukrainian
Published: Publishing house "Academperiodika" 2018
Subjects:
polaron
bipolaron
Fr¨ohlich Hamiltonian
electron-phonon interaction
high-temperature superconductivity
PACS 71.38, 71.38. i, 73.20.D, 74.80.D
полярон
бiполярон
гамiльтонiан Фрьолiха
електрон-фононна взаємодiя
високотемпературна надпровiднiсть
Online Access:https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018551
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Summary:The polaron and bipolaron energy functionals obtained in the framework of quantum field theory have been studied. Exact analytical expressions for the effective functionals are derived in terms of the two-parametrical trial function for a polaron and the three-parametrical one for a bipolaron. Variational solutions are found for the energies of the systems under study in the case of the intermediate values of Fr¨ohlich electron-phonon coupling constant, 4 ≤&nbsp;a ≤20.

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