Independent particle motion and correlations in fermion systems

1997/07/01 by V. R. Pandharipande, I. Sick, Peter K. A. deWitt Huberts · 12 citations
Physics and Astronomy · #Nuclear physics research studies #Advanced Chemical Physics Studies #Atomic and Molecular Physics

paper · doi:10.1103/revmodphys.69.981

openalex publication_date 1997/07/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/25

Abstract

The independent-particle model explains many features of atomic nuclei and other fermion systems. The low-energy states of nearly closed-shell systems can be interpreted as having quasiparticles in single-particle orbitals. The difference between physical particles and quasiparticles results from the effects of correlations in the system. In this Colloquium the authors consider the consequences of these correlations. They discuss in particular, mainly for the case of nuclei, the quasihole strength z (spectroscopic factor) that gives the probability of the quasiparticle's being a physical particle. Results from both theory and experiment indicate that z\ensuremath∼0.65 and imply that only \ensuremath∼2/3 of the time a nucleon acts as an independent particle bound in an average potential. The fraction of \ensuremath∼1/3 of correlated nucleons is larger than believed in the past.

Citations

• Roothaan-Hartree-Fock atomic wavefunctions
• The physics of simple metal clusters: self-consistent jellium model and semiclassical approaches
• Quasi-elastic electron scattering off nuclei
• Quantum Theory of Many-Particle Systems. I. Physical Interpretations by Means of Density Matrices, Natural Spin-Orbitals, and Convergence Problems in the Method of Configurational Interaction
• The Wave Mechanics of an Atom with a Non-Coulomb Central Field. Part I. Theory and Methods
• Quantum hadrodynamics

Cited by

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• The hard-sphere model of strongly interacting fermion systems
• Detection of back-to-back proton pairs in charged-current neutrino interactions with the ArgoNeuT detector in the NuMI low energy beam line
• The shell model as a unified view of nuclear structure
• Quantum Monte Carlo calculations of spectroscopic overlaps inA⩽7nuclei
• Momentum sharing in imbalanced Fermi systems
• Alpha particle clusters and their condensation in nuclear systems
• The Calculation of Single-Nucleon Energies of Nuclei by Considering Two-Body Effective Interaction, n(k,ρ), and a Hartree-Fock Inspired Scheme
• Possible determination of high-lying single-particle components with (p,d) reactions
• CORRELATIONS AND REALISTIC INTERACTIONS IN DOUBLY CLOSED SHELL NUCLEI
• Toward a reliable description of (p,pN) reactions in the distorted-wave impulse approximation
• Ingo Sick [wikipedia]