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The stability conditions, other inequalities, and the sum rule for the ferromagnetic fermi liquid

✍ Scribed by J. Czerwonko

Publisher
Elsevier Science
Year
1970
Weight
803 KB
Volume
47
Category
Article
ISSN
0031-8914

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The sum rule for the moments of the spectral density is discussed for the single-band Hubbard model. It is shown that respecting the sum rule up to the order m 3 is conceptually important for a qualitatively correct description of the quasi-particle band structure in the strong-correlation regime. D