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Merging of single-particle levels and non-Fermi-liquid behavior of finite Fermi systems | | V.A.Khodel
; J.W.Clark
; Haochen Li
; M.V.Zverev
; | | Date: |
5 Jan 2007 | | Subject: | Strongly Correlated Electrons | | Abstract: | We examine the problem of finite Fermi systems having a degenerate single-particle spectrum and show that the Landau approach, applied to such a system, admits the possibility of merging single-particle levels. It is demonstrated that the opportunity for this behavior is widespread in quantum many-body systems. The salient feature of the phenomenon is the occurrence of nonintegral quasiparticle occupation numbers, leading to a radical alteration of the standard quasiparticle picture. Implications of this alteration are considered for nuclear, atomic, and solid-state systems. | | Source: | arXiv, cond-mat/0701117 | | Services: | Forum | Review | PDF | Favorites | |
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