F-electron spectral function of the Falicov-Kimball model and the Wiener-Hopf sum equation approach

• Published in: Condensed Matter Physics
• Date: 2008
• Main Authors: Shvaika, A.M., Freericks, J.K.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 2008
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/119339
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: F-electron spectral function of the Falicov-Kimball model and the Wiener-Hopf sum equation approach / A.M. Shvaika, J.K. Freericks // Condensed Matter Physics. — 2008. — Т. 11, № 3(55). — С. 425-442. — Бібліогр.: 25 назв. — англ.

We derive an alternative representation for the f-electron spectral function of the Falicov-Kimball model from the original one proposed by Brandt and Urbanek. In the new representation, all calculations are restricted to the real time axis, allowing us to go to arbitrarily low temperatures. The g...