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Title: Merging of Single-Particle Levels and Non-Fermi-Liquid Behavior of Finite Fermi Systems

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.

Authors:
 [1];  [2]; ;  [3];  [1]
  1. Russian Research Centre Kurchatov Institute, Moscow, 123182 (Russian Federation)
  2. (United States)
  3. McDonnell Center for the Space Sciences and Department of Physics, Washington University, St. Louis, Missouri 63130 (United States)
Publication Date:
OSTI Identifier:
20951403
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 21; Other Information: DOI: 10.1103/PhysRevLett.98.216404; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; FERMI GAS; MANY-BODY PROBLEM; PARTICLES; SOLIDS; SPECTRA

Citation Formats

Khodel, V. A., McDonnell Center for the Space Sciences and Department of Physics, Washington University, St. Louis, Missouri 63130, Clark, J. W., Li Haochen, and Zverev, M. V. Merging of Single-Particle Levels and Non-Fermi-Liquid Behavior of Finite Fermi Systems. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.216404.
Khodel, V. A., McDonnell Center for the Space Sciences and Department of Physics, Washington University, St. Louis, Missouri 63130, Clark, J. W., Li Haochen, & Zverev, M. V. Merging of Single-Particle Levels and Non-Fermi-Liquid Behavior of Finite Fermi Systems. United States. doi:10.1103/PHYSREVLETT.98.216404.
Khodel, V. A., McDonnell Center for the Space Sciences and Department of Physics, Washington University, St. Louis, Missouri 63130, Clark, J. W., Li Haochen, and Zverev, M. V. Fri . "Merging of Single-Particle Levels and Non-Fermi-Liquid Behavior of Finite Fermi Systems". United States. doi:10.1103/PHYSREVLETT.98.216404.
@article{osti_20951403,
title = {Merging of Single-Particle Levels and Non-Fermi-Liquid Behavior of Finite Fermi Systems},
author = {Khodel, V. A. and McDonnell Center for the Space Sciences and Department of Physics, Washington University, St. Louis, Missouri 63130 and Clark, J. W. and Li Haochen and Zverev, M. V.},
abstractNote = {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.},
doi = {10.1103/PHYSREVLETT.98.216404},
journal = {Physical Review Letters},
number = 21,
volume = 98,
place = {United States},
year = {Fri May 25 00:00:00 EDT 2007},
month = {Fri May 25 00:00:00 EDT 2007}
}