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Condensed Matter > Strongly Correlated Electrons

Title: Self-consistent treatment of dynamical correlation functions using a spectral representation technique

Abstract: A system of equations resulting from an approximation of the equation of motion of Green functions for correlated electron systems is usually solved using Matsubara technique. In this work we propose an alternative method which works entirely along the real frequency axis. Using the example of the attractive Hubbard model studied in the T-matrix approximation both self-consistently and non-self-consistently we demonstrate how powerful such a treatment is especially when dynamic quantities are calculated.
Comments: 12 pages including 12 figures
Subjects: Strongly Correlated Electrons (cond-mat.str-el); Superconductivity (cond-mat.supr-con)
Journal reference: J. Low. Temp. Phys. 117 (1/2), 149, (1999)
Cite as: arXiv:cond-mat/9905019 [cond-mat.str-el]
  (or arXiv:cond-mat/9905019v1 [cond-mat.str-el] for this version)

Submission history

From: Martin Letz [view email]
[v1] Mon, 3 May 1999 12:41:16 GMT (304kb)