16 papers
Generic Rotation in a Collective SD Nucleon-Pair Subspace
Y. M. Zhao, S. Pittel, R. Bijker +2
Low-lying collective states involving many nucleons interacting by a random ensemble of two-body interactions (TBRE) are investigated in a collective SD-pair subspace, with the col…
Mean-field analysis of interacting boson models with random interactions
R. Bijker, A. Frank
We investigate the origin of the regular features observed in numerical studies of the interacting boson model with random interactions, in particular the dominance of L=0 ground s…
Randomness and Emerging Order in Nuclear Structure
R. Bijker, A. Frank
In order to investigate to what extent is the low-lying behavior of even-even nuclei dependent on particular nucleon-nucleon interactions, we consider systems of bosons where these…
Band structure from random interactions
R. Bijker, A. Frank
The anharmonic vibrator and rotor regions in nuclei are investigated in the framework of the interacting boson model using an ensemble of random one- and two-body interactions. We…
On the dominance of J(P)=0(+) ground states in even-even nuclei from random two-body interactions
R. Bijker, A. Frank, S. Pittel
Recent calculations using random two-body interactions showed a preponderance of J(P)=0(+) ground states, despite the fact that there is no strong pairing character in the force. W…
A symmetry adapted approach to vibrational excitations in atomic clusters
A. Frank, R. Lemus, R. Bijker +2
An algebraic method especially suited to describe strongly anharmonic vibrational spectra in molecules may be an appropriate framework to study vibrational spectra of Na clus…