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• W3102700913 endingPage "66" @default.
• W3102700913 startingPage "1" @default.
• W3102700913 abstract "The ground states of all even–even nuclei have angular momentum, I, equal to zero, I=0, and positive parity, π=+. This feature was believed to be a consequence of the attractive short-range interaction between nucleons. However, in the presence of two-body random interactions, the predominance of Iπ=0+ ground states (0 g.s.) was found to be robust both for bosons and for an even number of fermions. For simple systems, such as d bosons, sp bosons, sd bosons, and a few fermions in single-j shells for small j, there are a few approaches to predict and/or explain spin I ground state (I g.s.) probabilities. An empirical approach to predict I g.s. probabilities is available for general cases, such as fermions in a single-j (j>72) or many-j shells and various boson systems, but a more fundamental understanding of the robustness of 0 g.s. dominance is still out of reach. Further interesting results are also reviewed concerning other robust phenomena of many-body systems in the presence of random two-body interactions, such as the odd–even staggering of binding energies, generic collectivity, the behavior of average energies, correlations, and regularities of many-body systems interacting by a displaced two-body random ensemble." @default.
• W3102700913 created "2020-11-23" @default.
• W3102700913 creator A5006366692 @default.
• W3102700913 creator A5007960891 @default.
• W3102700913 creator A5088203613 @default.
• W3102700913 date "2004-10-01" @default.
• W3102700913 modified "2023-09-23" @default.
• W3102700913 title "Regularities of many-body systems interacting by a two-body random ensemble" @default.
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