Spectral fluctuations and thermalization in the f5p-shell space

Abstract

Chaos against thermalization, which was earlier investigated in the sd-shell space, is examined in the f5p-shell space. The two-body residual interaction of f5pvh with realistic single-particle energies have been utilized for carrying out f5p-shell space calculations. The present study demonstrates that the spectral fluctuations computed with realistic single-particle energies are in accordance with the Gaussian orthogonal ensemble of random matrices. Besides, the equilibrium heating is extremely related with the progress of many-body quantum chaos. Moreover, the single-particle entropy of individual states in the mean field basis is dissimilar to the thermodynamic entropy determined from the level density. The present results, which are a check of the ideas of many-body quantum chaos in a different version of the nuclear shell model applied to another part of the periodic table, are fully confirming what was formerly achieved in the sd-shell space and in this way exhibit their generality.