Spectral properties of four-time fermionic Green's functions
The spectral relations for the four-time fermionic Green’s functions are derived in the most general case. The
 terms which correspond to the zero-frequency anomalies, known before only for the bosonic Green’s functions,
 are separated and their connection with the second cumulants o...
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| Published in: | Condensed Matter Physics |
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| Date: | 2016 |
| Main Author: | |
| Format: | Article |
| Language: | English |
| Published: |
Інститут фізики конденсованих систем НАН України
2016
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/156225 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Spectral properties of four-time fermionic Green’s
 functions / A.M. Shvaika // Condensed Matter Physics. — 2016. — Т. 19, № 3. — С. 33004: 1–14. — Бібліогр.: 51 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | The spectral relations for the four-time fermionic Green’s functions are derived in the most general case. The
terms which correspond to the zero-frequency anomalies, known before only for the bosonic Green’s functions,
are separated and their connection with the second cumulants of the Boltzmann distribution function is elucidated. The high-frequency expansions of the four-time fermionic Green’s functions are provided for different
directions in the frequency space
Отримано в найбiльш загальнiй формi спектральнi спiввiдношення для чотиричасових фермiонних функцiй Ґрiна. Видiлено аномальнi внески на нульовiй частотi, якi ранiше були вiдомi тiльки для бозонних
функцiй Ґрiна, та висвiтлено їхнiй зв’язок з другими кумулянтами функцiї розподiлу Больцмана. Приведено високочастотнi розклади чотиричасових фермiонних функцiй Ґрiна для рiзних напрямкiв в просторi
частот.
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| ISSN: | 1607-324X |