Off-the-energy-shell properties of the mass operator and spectral functions in nuclear matter
TL;DR: In this article, the authors investigated the off-the-energy-shell properties of the mass operator M(k, ω) = V(k; e(k)) + iW (k, e(e) of this energy-momentum relation, i.e., its dependence upon the nucleon momentum k and upon the nucleus frequency ω.
About: This article is published in Nuclear Physics.The article was published on 1992-08-17. It has received 46 citations till now. The article focuses on the topics: Momentum & Nucleon.
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TL;DR: In this paper, various approaches to account for such correlations are described and compared to each other, including the holeline expansion, the coupled cluster or exponential S approach, the selfconsistent evaluation of Greens functions, variational approaches using correlated basis functions and recent developments employing quantum Monte-Carlo techniques.
141 citations
TL;DR: In this article, the properties of hadronic phases of dense matter in compact stars are described and analyzed using real-time Green's functions and applied to the study of baryonic matter at and above the saturation density.
112 citations
TL;DR: In this article, the authors present a method to calculate nuclear matter properties in the superfluid phase based on the use of self-consistent off-shell nucleon propagators in the T-matrix equation.
43 citations
TL;DR: The properties of nucleons in the nuclear medium at normal density are studied in this article, including the effects of short-range and tensor correlations induced by the realistic Reid soft-core interaction.
39 citations
TL;DR: In this article, the explicit energy dependence of the single particle self-energy (dispersive effects), due to short range correlations, is included in the treatment of neutron matter superfluidity.
35 citations
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TL;DR: In this paper, it is shown that certain analytical properties of the propagators of many-fermion systems lead rigorously to the existence of sharp discontinuities of the momentum distribution at absolute zero.
Abstract: It is shown that certain analytical properties of the propagators of many-fermion systems lead rigorously to the existence of sharp discontinuities of the momentum distribution at absolute zero. This discontinuity in the momentum distribution is used to define a Fermi surface for a system of interacting fermions. It is shown that the volume of this surface in momentum space is unaffected by the interaction. The same analytic properties are shown to lead, by direct statistical mechanical arguments, to simple expressions for the low-temperature heat capacity, the spin paramagnetism, and the compressibility of the system. These expressions are very analogous to the corresponding expressions for noninteracting particles. Finally, it is shown how the whole formalism may be generalized when an external periodic potential is present (band case).
903 citations
TL;DR: In this article, an energy independent non-local optical potential for the elastic scattering of neutrons from nuclei is proposed and the wave-equation solved numerically in its full integro-differential form.
744 citations
TL;DR: In this article, the authors combine the many-body theory and the low-density expansion developed by Brueckner, Bethe and others to investigate several properties of the ground state and of single-particle excited states of symmetric nuclear matter.
522 citations
TL;DR: In this paper, a new parametrization of the nucleon-nucleus optical-model potential based on data for A = 40 to 209, protons energies of 16 to 65 MeV and neutron energies of 10 to 26 MeV, including extensive polarized-beam data.
351 citations
TL;DR: In this paper, a microscopic theory based on orthogonal correlated basis functions is developed for the single-particle spectral function of an infinite Fermi system, where spin-isospin and tensor correlations are fully taken into account.
192 citations