Phys. Rev. C 63, 014307 (2000) [10 pages]Spin structure of many-body systems with two-body random interactionsReceived 6 July 2000; published 15 December 2000 We investigate the spin structure of many-fermion systems with a spin-conserving two-body random interaction. We find a strong dominance of spin-0 ground states and considerable correlations between energies and wave functions of low-lying states with different spin, but no indication of pairing. The spectral densities exhibit spin-dependent shapes and widths, and depend on the particle density as well as on the relative strengths of the spin-0 and spin-1 couplings in the two-body random matrix. The spin structure of low-lying states can largely be explained analytically. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.63.014307
DOI:
10.1103/PhysRevC.63.014307
PACS:
21.30.Fe, 05.30.-d, 21.60.Cs, 24.60.Lz
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