Depletion of the nuclear Fermi sea

Abstract

The short-range and tensor components of the bare nucleon-nucleon interaction induce a sizeable depletion of low momenta in the ground state of a nuclear many-body system. The self-consistent Green's function method within the ladder approximation provides an \textit{ab-initio} description of correlated nuclear systems that accounts properly for these effects. The momentum distribution predicted by this approach is analyzed in detail, with emphasis on the depletion of the lowest momentum state. The temperature, density, and nucleon asymmetry (isospin) dependence of the depletion of the Fermi sea is clarified. A connection is established between the momentum distribution and the time-ordered components of the self-energy, which allows for an improved interpretation of the results. The dependence on the underlying nucleon-nucleon interaction provides quantitative estimates of the importance of short-range and tensor correlations in nuclear systems.

18 pages, 12 figures, 1 table

References in corpus (9)

• Nuclear Force from Lattice QCD
• Probing Cold Dense Nuclear Matter
• Tensor Forces and the Ground-State Structure of Nuclei
• Recent observation of short range nucleon correlations in nuclei and their implications for the structure of nuclei and neutron stars
• Hot neutron matter from a Self-Consistent Green's Functions approach
• Asymmetry dependence of proton correlations
• Quasiparticles in Neon using the Faddeev Random Phase Approximation
• Variational Theory of Hot Nucleon Matter
• The entropy of a correlated system of nucleons

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• Protons in High Density Neutron Matter
• Origins and Impacts of High-Density Symmetry Energy
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