Merging of single-particle levels and non-Fermi-liquid behavior of finite Fermi systems |
| |
Authors: | Khodel V A Clark J W Li Haochen Zverev M V |
| |
Institution: | Russian Research Centre Kurchatov Institute, Moscow, 123182, Russia. |
| |
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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|