Microscopic analysis of two-body correlations in light nuclei

Abstract

Within a nonperturbative dynamical two-body approach - based on coupled equations of motion for the one-body density matrix and the two-body correlation function - we study the distribution of occupation numbers in a correlated system close to the groundstate, the relaxation of single-particle excitations and the damping of collective modes. For this purpose the nonlinear equations of motion are solved numerically within a finite oscillator basis for the first time adopting short-range repulsive and long-range attractive two-body forces. We find in all cases that the formation of long- and short-range correlations and their mixing is related to the long- and short-range part of the nucleon-nucleon interaction which dominate the resummation of loop or ladder diagrams, respectively. However, the proper description of relaxation or damping phenomena is found to require both types of diagrams as well as the mixed terms simultaneously.

31 LATEX pages, 18 figures available upon request, UGI-93-10

Cited by in corpus (11)

• Future of Nuclear Fission Theory
• Quantum dynamics and thermalization for out-of-equilibrium phi^4-theory
• Stochastic quantum dynamics beyond mean-field
• Transport Theoretical Approach to the Nucleon Spectral Function in Nuclear Matter
• Nuclear Matter Spectral Functions by Transport Theory
• Vibrations versus collisions and the iterative structure of two-body dynamics
• Connected Green function approach to ground state symmetry breaking in ${\Phi }_{1+1}^4$-theory
• Density-matrix formalism with three-body ground-state correlations
• Damping of Collective Nuclear Motion and Thermodynamic Properties of Nuclei beyond Mean Field
• Two-Body Correlations in Pionic Systems
• Convergence properties of the equal-time connected Green function approach for temporal gauge SU(2)_{2+1} Yang-Mills theory