arXiv:nucl-th/0006079·v1·Nuclear Theory
Breit-Wigner to Gaussian transition in strength functions
V.K.B. Kota🇮🇳 · R. Sahu🇮🇳
Abstract
Employing hamiltonians defined by two-body embedded Gaussian orthogonal ensemble of random matrices(EGOE(2)) plus a mean-field producing one-body part, strength functions (for states defined by the one-body part) are constructed for various values of the strength of the chaos generating two-body part. Numerical calculations for six and seven fermion systems clearly demonstrate Breit-Wigner to Gaussian transition, in the chaotic domain, in strength functions as found earlier in nuclear shell model and Lipkin-Meshkov-Glick model calculations.
Comments: 7 pages, 2 figures, submitted to Phys. Rev. C