Disentangling phase transitions and critical points in the proton-neutron interacting boson model by catastrophe theory
arXiv:1407.5573 · doi:10.1016/j.physletb.2014.07.038
Abstract
We introduce the basic concepts of catastrophe theory needed to derive analytically the phase diagram of the proton-neutron interacting boson model (IBM-2). Previous studies [1,2,3] were based on numerical solutions. We here explain the whole IBM-2 phase diagram including the precise order of the phase transitions in terms of the cusp catastrophe.
To be published in Physics Letters B