Analytical properties of the mean field in many fermion systems
نویسندگان
چکیده
منابع مشابه
Boson-fermion Model beyond Mean-field Approximation
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متن کاملComment on “ Boson - fermion model beyond the mean - field approximation ”
In a recent paper [Alexandrov A S 1996 J. Phys.: Condens. Matter 8 6923–32; cond-mat/9603111], it has been suggested that there is no Cooper pairing in boson-fermion models of superconductivity. We show that this conjecture is based on an inconsistent approximation that violates an exact identity. Quite generally, the divergence of the fermion t-matrix (the Thouless criterion) is accompanied by...
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ژورنال
عنوان ژورنال: Zeitschrift f�r Physik A Atomic Nuclei
سال: 1989
ISSN: 0930-1151,1434-601X
DOI: 10.1007/bf01294514