IBAR: Interacting boson model calculations for large system sizes

This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018) Abstract Scaling the system size of the interacting boson model-1 (IBM-1) into the realm of hundreds of bosons has many interesting applications in the field of nuclear structure, most notably quantum phase transitions in nuclei. We introduce IBAR, a new software package for calculating the eigenvalues and eigenvectors of the IBM-1 Hamiltonian, for large numbers of bosons. Energies and wavefunctions of the nuclear states, as well as transition strengths between them, are calculated using these values.... Title of program: IBAR Catalogue Id: AELI_v1_0 Nature of problem Construction and diagonalization of large Hamiltonian matrices, using reduced matrix elements of the d-boson creation operator. Versions of this program held in the CPC repository in Mendeley Data AELI_v1_0; IBAR; 10.1016/j.cpc.2011.12.024